When it comes to diagnosing issues with your GMC vehicle, understanding manufacturer-specific fault codes can be a game changer. These codes serve as a communication bridge between your car’s onboard computer and you, the driver. Each code reveals essential information about possible malfunctions, helping you pinpoint problems quickly and efficiently.
In this blog post, we’ll dive deep into what GMC manufacturer-specific fault codes mean and how they can help you maintain peak performance in your vehicle.
What Does The GMC Manufacturer-specific Fault Codes ?
GMC manufacturer-specific fault codes are unique alphanumeric sequences generated by the vehicle’s onboard diagnostics system. Unlike generic OBD-II codes, which apply to all vehicles, these codes are tailored specifically for GMC models. This specificity allows for more accurate diagnosis of issues that may be unique to each model.
Understanding these fault codes is crucial for both troubleshooting and maintenance. They provide insight into what components need attention and can guide technicians in their repairs. With this knowledge at your fingertips, you gain valuable leverage when communicating with repair shops or conducting DIY fixes on your GMC.
What Are The Types Of GMC Manufacturer-specific Error Codes ?
GMC manufacturer-specific error codes can be divided into several categories, each reflecting different systems within the vehicle :
Powertrain codes focus on engine and transmission issues. These are critical for ensuring optimal performance and fuel efficiency. If something feels off while driving, these codes might hold the answer.
Body codes relate to components like doors, windows, and lighting systems. They help diagnose problems that affect both safety and comfort.
Chassis codes encompass areas such as brakes and suspension. Any irregularities here could impact handling or ride quality, making them essential to monitor.
Network communication codes deal with how various modules interact within your vehicle’s system. Issues in this area may lead to multiple warning lights illuminating on your dashboard.
Understanding the types of GMC manufacturer-specific error codes is vital for effective troubleshooting and maintenance.
How Can You Diagnose A GMC Fault Code?
Diagnosing a GMC fault code involves several steps. First, you need an OBD-II scanner. This tool plugs into your vehicle’s diagnostic port, usually found under the dashboard.
Once connected, turn on the ignition but don’t start the engine. The scanner will read any stored codes in your vehicle’s computer system. Each code corresponds to a specific issue within various components.
After retrieving the codes, look them up for more details about their meanings and potential causes. Manufacturer-specific codes may require specialized knowledge or resources to interpret correctly.
It’s crucial to pay attention to accompanying symptoms like unusual noises or warning lights on your dashboard. These clues can guide you toward pinpointing the problem with greater accuracy.
If you’re uncertain about interpreting these codes or how they relate to your vehicle’s performance issues, consulting a professional mechanic is always wise.
How To Reset A GMC Fault Code ?
Resetting a GMC fault code is often straightforward. First, you’ll need an OBD-II scanner. This tool connects to your vehicle’s diagnostic port, usually located under the dashboard.
Once connected, turn on the ignition without starting the engine. Follow the instructions on your scanner’s display. Look for options like “Erase Codes” or “Clear Codes.” Select this option and confirm when prompted.
After clearing the codes, it’s wise to take your vehicle for a short drive. This helps ensure any issues don’t return immediately and allows your system to recalibrate.
If warning lights come back on after resetting, it could indicate ongoing issues that require further diagnosis. Always keep in mind that simply erasing codes doesn’t fix underlying problems; thorough inspection might be necessary for long-term solutions.
GMC Manufacturer-specific Fault Codes List:
Understanding the specific fault codes for GMC vehicles is crucial for effective diagnosis and repair. Here’s a comprehensive list of some common manufacturer-specific fault codes associated with GMC:
‘P’ (Powertrain) fault codes :
| P1020 Camshaft Phasing System Malfunction |
| P1021 CNG Fuel Injector 1 Circuit Malfunction |
| P1022 CNG Fuel Injector 2 Circuit Malfunction |
| P1023 CNG Fuel Injector 3 Circuit Malfunction |
| P1024 CNG Fuel Injector 4 Circuit Malfunction |
| P1025 CNG Fuel Injector 5 Circuit Malfunction |
| P1026 CNG Fuel Injector 6 Circuit Malfunction |
| P1027 CNG Fuel Injector 7 Circuit Malfunction |
| P1028 CNG Fuel Injector 8 Circuit Malfunction |
| P1043 Reductant Pump High Control Circuit Low Voltage |
| P1044 Reductant Pump High Control Circuit High Voltage |
| P1045 Reductant Purge Valve High Control Circuit Low Voltage |
| P1048 Reductant Injector High Control Circuit Low Voltage |
| P1049 Reductant Injector High Control Circuit High Voltage |
| P1082 Fuel Filter Pressure Switch Performance |
| P1093 Fuel Rail Pressure Range/Performance |
| P1094 Fuel Rail Pressure Solenoid Circuit Malfunction |
| P10CC Exhaust Aftertreatment Fuel Injector Control Circuit Shorted |
| P10CD Exhaust Aftertreatment Fuel Injector High Control Circuit Low Voltage |
| P10CE Exhaust Aftertreatment Fuel Injector High Control Circuit High Voltage |
| P1101 Intake Air Flow System Performance |
| P1106 MAP Sensor Circuit Intermittent High Input |
| P1107 MAP Sensor Circuit Intermittent Low Input |
| P1111 IAT Sensor Circuit Intermittent High Input |
| P1112 IAT Sensor Circuit Intermittent Low Input |
| P1114 ECT Sensor Circuit Intermittent Low Input |
| P1115 ECT Sensor Circuit Intermittent High Input |
| P111C Charge Air Cooler (CAC) Temperature – Intake Air Temperature (IAT) Sensor 2 Correlation |
| P111D Intake Air Temperature (IAT) Sensor 1-Fuel Temperature Sensor 2 Correlation |
| P1120 Throttle Position (TP) Sensor 1 Circuit |
| P1121 TP Sensor Circuit High Input (Intermittent) |
| P1122 TP Sensor Circuit Intermittent Low Input |
| P1125 Accelerator Pedal Position System Malfunction |
| P1133 HO2S Insufficient Switching Bank 1 Sensor 1 |
| P1134 HO2S-11 (Bank 1 Sensor 1) Transition Time Ratio |
| P1137 HO2S (Sensor 1) Voltage Too High or Too Low |
| P1138 HO2S (Sensor 2) Voltage Too High |
| P113A Exhaust Gas Temperature Sensors 3-4 Not Plausible |
| P1153 HO2S Insufficient Switching Bank 2 Sensor 1 |
| P1154 HO2S-21 (Bank 2 Sensor 1) Transition Time Ratio |
| P1171 Fuel System Lean During Acceleration |
| P1172 Secondary Fuel Pump Insufficient/No Fuel Flow |
| P1174 Fuel Trim Cylinder Balance Bank 1 |
| P1175 Fuel Trim Cylinder Balance Bank 2 |
| P1191 Intake Air Duct Leak |
| P11AF HO2S Performance – Signal High During Moderate Load Sensor 2 |
| P11B2 HO2S Performance – Signal Low During Moderate Load Sensor 2 |
| P11B5 HO2S Current Performance Sensor 2 |
| P11CB NOx Sensor 1 Performance – Signal High |
| P11CC NOx Sensor 1 Performance – Signal Low |
| P11DB NOx Sensor 1 Current Performance |
| P11DC NOx Sensor 2 Current Performance |
| P1201 Gas Mass Sensor Range/Performance |
| P1203 Gas Mass Flow Sensor High Frequency |
| P1207 FICM PWM Signal To PCM Circuit Malfunction |
| P1208 Fuel Rail Pressure Signal To PCM Circuit Malfunction |
| P1214 Injection Pump Timing Offset |
| P1215 High Pressure Or Low Pressure Lockout, MIL, NGO Circuit Malfunction |
| P1216 Fuel Solenoid Response Time Too Short |
| P1217 Fuel Solenoid Response Time Too Long |
| P1218 Injection Pump Calibration Circuit Malfunction |
| P1220 TP Sensor 2 Circuit Malfunction |
| P1221 TP Sensor 2 Signal Correlation |
| P1223 Injection Control Circuit Commanded State to Actual State Mismatch |
| P1224 Fuel Injector 1 Control Circuit Shorted |
| P1226 Injection Control Circuit Commanded State to Actual State Mismatch |
| P1227 Fuel Injector 2 Control Circuit Shorted |
| P1229 Injection Control Circuit Commanded State to Actual State Mismatch |
| P122A Fuel Injector 3 Control Circuit Shorted |
| P122C Intake Air (IA) Flow Valve Control Circuit Shorted |
| P122D Intake Air (IA) Flow Position Sensor Exceeded Learning Limit |
| P122E Intake Air (IA) Flow Valve Control Circuit 2 Low Voltage |
| P122F Intake Air (IA) Flow Valve Control Circuit 2 High Voltage |
| P1232 Injection Control Circuit Commanded State to Actual State Mismatch |
| P1233 Fuel Injector 4 Control Circuit Shorted |
| P1235 Injection Control Circuit Commanded State to Actual State Mismatch |
| P1236 Fuel Injector 5 Control Circuit Shorted |
| P1238 Injection Control Circuit Commanded State to Actual State Mismatch |
| P1239 Fuel Injector 6 Control Circuit Shorted |
| P1241 Injection Control Circuit Commanded State to Actual State Mismatch |
| P1242 Fuel Injector 7 Control Circuit Shorted |
| P1244 Injection Control Circuit Commanded State to Actual State Mismatch |
| P1247 Fuel Injector 8 Control Circuit Shorted |
| P1255 Fuel Pump Control Module Driver Over-temperature |
| P1258 Engine Coolant Over temperature – Protection Mode Active |
| P125A Fuel Pressure Regulator 2 High Control Circuit Low Voltage |
| P125B Fuel Pressure Regulator 2 High Control Circuit High Voltage |
| P1261 High Voltage Circuit Fault – Cylinders 1, 4, 6, and 7 |
| P1262 High Voltage Circuit Fault – Cylinders 2, 3, 5, and 8 |
| P1270 ECM Cannot Process APP Analog Data into Digital Data |
| P1271 APP Sensors 1 and 2 Out of Range with Each Other |
| P1272 APP Sensors 2 and 3 Out of Range with Each Other |
| P1273 APP Sensors 1 and 3 Out of Range with Each Other |
| P1275 Accelerator Pedal Position Sensor 1 Circuit Malfunction |
| P1276 Accelerator Pedal Position Sensor 1 Range/Performance |
| P1277 APP Sensor 1 Low Voltage |
| P1278 APP Sensor 1 High Voltage |
| P1280 Accelerator Pedal Position Sensor 2 Circuit Malfunction |
| P1281 Accelerator Pedal Position Sensor 2 Range/Performance |
| P1282 APP Sensor 2 Low Voltage |
| P1283 APP Sensor 2 High Voltage |
| P1285 Accelerator Pedal Position Sensor 3 Circuit Malfunction |
| P1286 Accelerator Pedal Position Sensor 3 Range/Performance |
| P1287 APP Sensor 3 Low Voltage |
| P1288 APP Sensor 3 High Voltage |
| P128E Fuel Rail Pressure Performance |
| P1293 Injector Circuit Low to High Current Transition Time Bank 1 |
| P1294 Injector Circuit Low to High Current Transition Time Bank 2 |
| P1295 Injector Circuit High to Low Current Transition Time Bank 1 |
| P1296 Injector Circuit High to Low Current Transition Time Bank 2 |
| P12B3 Cylinder 1 Injection Timing Retarded |
| P12B4 Cylinder 1 Injection Timing Advanced |
| P12B5 Cylinder 2 Injection Timing Retarded |
| P12B6 Cylinder 2 Injection Timing Advanced |
| P12B7 Cylinder 3 Injection Timing Retarded |
| P12B8 Cylinder 3 Injection Timing Advanced |
| P12B9 Cylinder 4 Injection Timing Retarded |
| P12BA Cylinder 4 Injection Timing Advanced |
| P12BB Cylinder 5 Injection Timing Retarded |
| P12BC Cylinder 5 Injection Timing Advanced |
| P12BD Cylinder 6 Injection Timing Retarded |
| P12BE Cylinder 6 Injection Timing Advanced |
| P12BF Cylinder 7 Injection Timing Retarded |
| P12C0 Cylinder 7 Injection Timing Advanced |
| P12C1 Cylinder 8 Injection Timing Retarded |
| P12C2 Cylinder 8 Injection Timing Advanced |
| P1336 Crankshaft Position (CKP) System Variation Not Learned |
| P1345 Camshaft To Crankshaft Position Correlation Malfunction |
| P1351 ICM Ignition Control Circuit High Input |
| P1361 ICM Ignition Control Circuit Low Input |
| P1380 Misfire Detected – Rough Road Data Not Available |
| P1381 Misfire Detected – No Communication with Brake Control Module |
| P1400 Cold Start Injection Monitoring |
| P1404 EGR Valve Closed Position Performance |
| P1406 EGR Valve Pintle Position Circuit Malfunction |
| P1407 Exhaust Gas Recirculation (EGR) Motor Control Circuit Shorted |
| P1409 Exhaust Gas Recirculation (EGR) System Performance |
| P140A Exhaust Gas Recirculation (EGR) Cooler Bypass Position Sensor Exceeded Learning Limit |
| P140B Exhaust Gas Recirculation (EGR) Flow Insufficient |
| P140C Exhaust Gas Recirculation (EGR) Flow Excessive |
| P140D Exhaust Gas Recirculation (EGR) Motor Control Circuit 2 Low Voltage |
| P140E Exhaust Gas Recirculation (EGR) Motor Control Circuit 2 High Voltage |
| P140F Exhaust Gas Recirculation (EGR) Motor Current Performance |
| P1411 Exhaust Gas Recirculation (EGR) Cooler Bypass Valve Control Circuit 2 Low Voltage |
| P1412 Exhaust Gas Recirculation (EGR) Cooler Bypass Valve Control Circuit 2 High Voltage |
| P1413 Exhaust Gas Recirculation (EGR) Cooler Bypass Valve Control Circuit Shorted |
| P1414 Exhaust Gas Recirculation (EGR) Cooler Bypass Valve Current Performance |
| P1415 Secondary Air Injection System (Bank 1) Malfunction |
| P1416 Secondary Air Injection System (Bank 2) Malfunction |
| P1431 Fuel Level Sensor 2 Performance |
| P1432 Fuel Level Sensor 2 Circuit Low Voltage |
| P1433 Fuel Level Sensor 2 Circuit High Voltage |
| P1441 EVAP System Flow During Non-Purge |
| P144B Closed Loop Diesel Particulate Filter (DPF) Regeneration Control At Limit – Stage 1 Temperature Too Low |
| P144C Closed Loop Diesel Particulate Filter (DPF) Regeneration Control At Limit – Stage 1 Temperature Too High |
| P144E Closed Loop Diesel Particulate Filter (DPF) Regeneration Control At Limit – Stage 2 Temperature Too Low |
| P144F Closed Loop Diesel Particulate Filter (DPF) Regeneration Control At Limit – Stage 2 Temperature Too High |
| P1481 Cooling Fan Speed Signal Lost |
| P1482 Cooling Fan Control Circuit Improper Voltage |
| P1484 Cooling Fan Speed Excessive RPM |
| P1504 VSS Circuit Voltage Too Low |
| P1508 Idle Speed Low – IAC System Not Responding |
| P1509 Idle Speed High – IAC System Not Responding |
| P150A Transmission Output Speed Signal Circuit |
| P150B Transmission Output Speed Sensor Circuit Intermittent |
| P150C Transmission Control Module Engine Speed Request Signal Message Counter Incorrect |
| P1512 Control Module Throttle Actuator Position Performance |
| P1514 Throttle Body Performance |
| P1515 Control Module Throttle Actuator Position Performance |
| P1516 Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance |
| P1517 Throttle Actuator Control Module Performance |
| P1518 Throttle Actuator Control Module Serial Data Malfunction |
| P1520 Park/Neutral Position (PNP) Switch Circuit |
| P1523 TAC Module Return Range/Performance |
| P1545 A/C Relay Output Circuit Malfunction |
| P154A Intake Air (IA) Heater Feedback Circuit |
| P154B Intake Air (IA) Heater Voltage Signal Circuit |
| P154C Intake Air (IA) Heater Current Signal Circuit |
| P154D Intake Air (IA) Heater Temperature Signal Circuit |
| P1550 FICM Detects Low Voltage Supply |
| P1571 Traction Control Torque Request Circuit |
| P1574 Stoplamp Switch Circuit |
| P159C Power Take-Off (PTO) Remote Engine Shutdown Switch Circuit |
| P15F0 Engine Torque Delivered Circuit |
| P15F1 Axle Torque Request Circuit |
| P15F2 Engine Torque Command Circuit |
| P1600 Control Module Long Term Memory Performance |
| P1601 Serial Communication Malfunction |
| P1602 Lost Communications with Brake/Traction Control (EBTCM) System |
| P160C Engine Calibration Information Not Programmed – GPCM |
| P161A Glow Plug Control Module Not Programmed |
| P1621 Control Module Long Term Memory Performance |
| P1626 Theft Deterrent Fuel Enable Signal Lost |
| P1627 Control Module Analog to Digital Performance |
| P162B Remote Vehicle Speed Limiting Signal Message Counter Incorrect |
| P1630 Theft Deterrent System – Learn Mode Enable |
| P1631 Theft Deterrent System – Learn Mode Enable |
| P1632 Theft Deterrent Fuel Disable Signal Received |
| P1633 Ignition Supplement Power (0) Switch Circuit Malfunction |
| P1634 Improper Ignition 1 Signal Voltage |
| P1635 5-Volt Reference Circuit Low Input |
| P1637 Generator ‘L’ Terminal Circuit Malfunction |
| P1638 Generator ‘F’ Terminal Circuit Malfunction |
| P1639 5-Volt Reference Circuit Low Input |
| P163C Glow Plug Module Primary Circuit |
| P163D Glow Plug Control Module Secondary Circuit |
| P163E Glow Plug Control Module Overtemperature |
| P1641 MIL Control Circuit Malfunction |
| P1643 Wait To Start Lamp Control Circuit Malfunction |
| P1644 EBCM Invalid Torque Signal |
| P1653 EGR Vent Solenoid Control Circuit Malfunction |
| P1654 Service Throttle Soon Lamp Control Circuit Malfunction |
| P1655 EGR Control Solenoid Control Circuit Malfunction |
| P1656 Wastegate Solenoid Control Circuit Malfunction |
| P1658 FICM Detects Current Through Driver With Driver Off |
| P1668 Generator L-Terminal Control Circuit |
| P166B Intake Air (IA) Heater Over Temperature |
| P1680 Control Module Long Term Memory Performance |
| P1681 Control Module Long Term Memory Performance |
| P1682 Ignition 1 Switch Circuit 2 |
| P1683 Control Module Long Term Memory Performance |
| P1684 Transmission Control Module (TCM) Power Up Temperature Sensor Performance |
| P1685 Transmission Control Module (TCM) Power Up Temperature Sensor Circuit Low Voltage |
| P1686 Transmission Control Module (TCM) Power Up Temperature Sensor Circuit High Voltage |
| P1687 Fuel Injector Control Module Driver Stuck On |
| P1688 Engine Torque Data Performance |
| P1689 EBCM Invalid Torque Signal |
| P168C Turbocharger Boost Control Position Slow Response – Increasing Position |
| P168D Turbocharger Boost Control Position Slow Response – Decreasing Position |
| P16A0 Sensor Communication Circuit Low Voltage |
| P16A1 Sensor Communication Circuit High Voltage |
| P16A2 Sensor Communication Circuit Performance |
| P16F2 Control Module Transmission Direction Range Switch |
| P16F3 Control Module Redundant Memory Performance |
| P16F4 Control Module Transmission Range Control Performance |
| P16F5 Control Module Programmable Logic Device |
| P16F6 Control Module Range State Command |
| P16F9 Control Module Shutdown Performance |
| P1709 Pressure Switch “E” Circuit Malfunction |
| P1710 Pressure Switch “E” Stuck Open /Performance |
| P1711 Pressure Switch “E” Circuit Low / Stuck Closed |
| P1712 Pressure Switch “E” Circuit High |
| P1713 Pressure Switch Reverse Circuit |
| P1714 Pressure Switch Reverse Stuck Open |
| P1720 Solenoid “A” Control Clutch Stuck Off |
| P1721 Solenoid “B” Control Clutch Stuck Off |
| P1723 Solenoid “A” Control Clutch Stuck On |
| P1724 Solenoid “B” Control Clutch Stuck On |
| P1751 Shift Valve 1 Performance |
| P1760 Transmission Position Sensor Signal |
| P1761 Up and Down Shift Switch Signal Circuit |
| P1762 Transmission Mode Switch Signal Circuit |
| P1779 Engine Torque Data Performance |
| P1781 TCM MIL Request Circuit Low Voltage |
| P179B Range State Command Circuit |
| P1810 TFP Valve Position Switch Assembly (4L60-E, 4L65-E, 4L80-E) |
| P1811 Maximum Adapt and Long Shift (6.5L Diesel only) |
| P1812 Transmission Fluid Over-Temperature |
| P1815 TFP Manual Valve Position Switch Circuit Malfunction |
| P1816 TFP Manual Valve Position Switch Circuit Malfunction |
| P1818 Transmission Fluid Pressure (TFP) Valve Position Switch Indicates Drive without Drive Ratio |
| P181C Internal Mode Switch 2 R1 Circuit Low Voltage |
| P181D Internal Mode Switch 2 R1 Circuit High Voltage |
| P181E Internal Mode Switch 2 R2 Circuit Low Voltage |
| P181F Internal Mode Switch 2 R2 Circuit High Voltage |
| P1824 Internal Mode Switch P Circuit High Voltage |
| P1825 Internal Mode Switch – Invalid Range |
| P182A Internal Mode Switch A Circuit Low Voltage |
| P182B Internal Mode Switch B Circuit Low Voltage |
| P182C Internal Mode Switch B Circuit High Voltage |
| P182D Internal Mode Switch P Circuit Low Voltage |
| P182E Internal Mode Switch-Invalid Range |
| P182F Internal Mode Switch C Circuit High Voltage |
| P1831 Pressure Control (PC)/Shift Lock Solenoid Control Circuit Low Voltage |
| P1832 Pressure Control (PC)/Shift Lock Solenoid Control Circuit High Voltage |
| P1838 Internal Mode Switch A Circuit High Voltage |
| P1839 Internal Mode Switch C Circuit Low Voltage |
| P183A Internal Mode Switch 2 D1 Circuit Low Voltage |
| P183B Internal Mode Switch 2 D1 Circuit High Voltage |
| P183C Internal Mode Switch 2 D2 Circuit Low Voltage |
| P183D Internal Mode Switch 2 D2 Circuit High Voltage |
| P183E Internal Mode Switch 2 – Invalid Range |
| P183F Internal Mode Switch 1-2 Correlation |
| P184A Internal Mode Switch 2 S Circuit Low Voltage |
| P184B Internal Mode Switch 2 S Circuit High Voltage |
| P1860 TCM PWM Solenoid Circuit Malfunction (4L60-E) |
| P1862 TCC Solenoid Circuit Malfunction |
| P1863 TCC Solenoid Circuit Short to Voltage |
| P1864 TCC Enable Solenoid Circuit Malfunction (4T60-E) |
| P1870 Transmission Component Slipping (4L60-E, 4L65-E, 4L80-E) |
| P1871 Undefined Gear Ratio (5.7L and 7.4L Gas) |
| P1875 4WD Low Switch Circuit Fault (4L60-E, 4L65-E, 4L80-E) |
| P1876 Up and Down Shift Enable Switch Circuit Low Voltage |
| P1886 3-2 SS Valve Assembly CKT Electrical |
| P1915 Internal Mode Switch Does Not Indicate Park/Neutral (P/N) During Start |
| P1A00 Battery Energy Control Module Reset |
| P1A01 Battery Energy Control Module Long Term Memory Performance |
| P1A02 Battery Energy Control Module Loop Overrun |
| P1A03 Battery Energy Control Module Options Incorrect |
| P1A04 Battery Energy Control Module Programming Read Only Memory (ROM) |
| P1A05 Battery Energy Control Module Random Access Memory (RAM) |
| P1A06 Battery Energy Control Module Read Only Memory (ROM) |
| P1A07 Battery Energy Control Module 5-Volt Reference Circuit |
| P1A08 Battery Energy Control Module Stack Overrun |
| P1A09 Battery Energy Control Module Hybrid System Voltage |
| P1A0C Battery Energy Control Module System Voltage Low |
| P1A0D Battery Energy Control Module System Voltage High |
| P1A1F Battery Energy Control Module Hybrid Battery System Voltage Low |
| P1A20 Hybrid Battery System Precharge Time Too Long |
| P1A21 Hybrid Battery Contactor Control Sequence Incorrect |
| P1A4E Battery Energy Control Module Hybrid Battery System Voltage High |
| P1A4F Drive Motor 1 Control Module Not Programmed |
| P1A50 Drive Motor 1 Control Module Random Access Memory (RAM) |
| P1A51 Drive Motor 1 Control Module Read Only Memory (ROM) |
| P1A52 Drive Motor 2 Control Module Not Programmed |
| P1A53 Drive Motor 2 Control Module Random Access Memory (RAM) |
| P1A54 Drive Motor 2 Control Module Read Only Memory (ROM) |
| P1A6C SGCM Service Calibration Fault |
| P1A7E Starter/Generator Control Module Overtemperature High Voltage System Disabled |
| P1A7F Starter/Generator Control Module Coolant Level Sensor 1 Low Voltage |
| P1A80 Starter/Generator Control Module Coolant Level Sensor 1 High Voltage |
| P1A81 Starter/Generator Control Module Coolant Level Sensor 2 Low Voltage |
| P1A82 Starter/Generator Control Module Coolant Level Sensor 2 High Voltage |
| P1A83 Starter/Generator Control Module Coolant Level Sensor 3 Low Voltage |
| P1A84 Starter/Generator Control Module Coolant Level Sensor 3 High Voltage |
| P1A85 Starter/Generator Control Module Coolant Level Sensor 4 Low Voltage |
| P1A86 Starter/Generator Control Module Coolant Level Sensor 4 High Voltage |
| P1A87 Low Starter/Generator Control Module Coolant Level |
| P1A88 42 Volt System Performance |
| P1A89 42 Volt System Voltage Low |
| P1A8A 42 Volt System Voltage High |
| P1A8C 42 Volt Inverter Overtemperature |
| P1ABE Battery Energy Control Module Hybrid Battery Pack Overtemperature |
| P1AC1 Starter/Generator Control Module Cooling Fan Relay Control Circuit Low Voltage |
| P1AC2 Starter/Generator Control Module Cooling Fan Relay Control Circuit High Voltage |
| P1AC6 Drive Motor 1 Control Module Crankshaft Position Sensor Circuit |
| P1AC7 Drive Motor 1 Control Module Crankshaft Position Sensor Performance |
| P1AC9 HCM Service Calibration Fault |
| P1ADC Drive Motor 1 Control Module Long Term Memory Performance |
| P1ADD Drive Motor 2 Control Module Long Term Memory Performance |
| P1ADE Drive Motor 1 Control Module System Voltage Low |
| P1AE0 Drive Motor 2 Control Module System Voltage Low |
| P1AE2 Battery Energy Control Module High Voltage System Interlock Circuit |
| P1AE3 Battery Energy Control Module High Voltage System Interlock Circuit Low Voltage |
| P1AE4 Battery Energy Control Module High Voltage System Interlock Circuit High Voltage |
| P1AE5 Battery Energy Control Module Hybrid Battery Power Off Control Circuit |
| P1AE6 Battery Energy Control Module Hybrid Battery Voltage Isolation Sensor Circuit |
| P1AE7 Battery Energy Control Module Hybrid Battery Voltage System Isolation Lost |
| P1AE8 Drive Motor 1 Control Module Hybrid Battery Voltage Sense Circuit Low Voltage |
| P1AE9 Drive Motor 1 Control Module Hybrid Battery Voltage Sense Circuit High Voltage |
| P1AEA Drive Motor 2 Control Module Hybrid Battery Voltage Sense Circuit Low Voltage |
| P1AEB Drive Motor 2 Control Module Hybrid Battery Voltage Sense Circuit High Voltage |
| P1AEC Drive Motor 1 Control Module Hybrid/EV Battery System Voltage |
| P1AED Drive Motor 2 Control Module Hybrid/EV Battery System Voltage |
| P1AEE Drive Motor 1 Control Module Hybrid/EV Battery System Voltage High |
| P1AEF Drive Motor 2 Control Module Hybrid/EV Battery System Voltage High |
| P1AF0 Drive Motor 1 Control Module Hybrid Battery Voltage System Isolation Lost |
| P1AF2 Drive Motor 2 Control Module Hybrid Battery Voltage System Isolation Lost |
| P1AF4 Drive Motor 1 Control Module Hybrid Battery Voltage Isolation Sensor Circuit Low Voltage |
| P1AF5 Drive Motor 1 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage |
| P1AF6 Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit Low Voltage |
| P1AF7 Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage |
| P1AF8 Drive Motor 1 Control Module Shutdown Performance |
| P1AFA Drive Motor 1 Control Module Programmable Logic Device Not Programmed |
| P1AFB Drive Motor 1 Control Module Programmable Logic Device Security Code |
| P1AFC Drive Motor 1 Control Module Serial Peripheral Interface (SPI) Bus |
| P1AFD Drive Motor 1 Control Module Serial Communications Interface (SCI) Bus |
| P1AFE Drive Motor 2 Control Module Shutdown Performance |
| P1B01 Drive Motor 2 Control Module Programmable Logic Device Security Code |
| P1B02 Drive Motor 2 Control Module Serial Peripheral Interface (SPI) Bus |
| P1B03 Drive Motor 1 Position Sensor Circuit Loss of Tracking |
| P1B04 Drive Motor 2 Position Sensor Circuit Loss of Tracking |
| P1B05 Drive Motor 1 Control Module High Voltage System Interlock Circuit |
| P1B06 Drive Motor 2 Control Module High Voltage System Interlock Circuit |
| P1B0D Drive Motor 1 Control Module Drive Motor 1 Overspeed |
| P1B0E Drive Motor 2 Control Module Drive Motor 2 Overspeed |
| P1B0F Drive Motor 1 Position Learn Incorrect |
| P1B10 Drive Motor 2 Position Learn Incorrect |
| P1B15 Regenerative Braking Torque Request Signal Message Counter Incorrect |
‘C’ (Chassis) fault codes :
| C120A Brake Boost Regulation Pressure Sensor Plausibility Failure |
| C120C Brake Pedal Position Sensor 4 Not Plausible |
| C120D Traction Control Power Switch Circuit Open |
| C120E Traction Control Power Switch Circuit Shorted |
| C121A ABS Regenerative Axle Pressure Sensor |
| C121C EBCM Internal Communication Error |
| C121D Improper Shutdown |
| C121E EBCM Malfunction |
| C121F EBCM Unexpected Exception |
| C122E Wheel Speed Sensor Frequency Error |
| C123A EBCM High End Timer Watchdog |
| C123B EBCM High End Timer Program Overflow |
| C123C EBCM High End Timer RAM Fault |
| C123D EBCM Solenoid Timeout |
| C123E EBCM High End Timer Periodic Interrupt |
| C123F EBCM Serial Peripheral Interface Inoperative |
| C1255 Electronic Control Unit Performance |
| C1256 Program ROM Checksum Error |
| C126D EBCM communication Bus B RAM Error |
| C126E EBCM Stack Overrun |
| C126F EBCM Serial Peripheral Interface Performance |
| C127C EBCM Self Test Failed |
| C127D Antilock Brake System (ABS) Brake Switch Circuit |
| C127E EBCM Module High Temperature |
| C128A Brake Boost Regulation Pressure Sensor Above Maximum Threshold |
| C128B Master Cylinder Pressure Sensor Above Maximum Threshold |
| C128C ABS Regenerative Axle Pressure Sensor Offset Error |
| C128D Brake Boost Regulation Pressure Sensor |
| C128E Master Cylinder Pressure Sensor |
| C128F ABS Regenerative Axle Pressure Sensor Raw Offset Error |
| C129A Brake Pedal Position Sensor 3 Circuit Low |
| C129B Brake Pedal Position Sensor 3 Circuit High |
| C129D Brake Pedal Position Sensor 4 Circuit Low |
| C129E Brake Pedal Position Sensor 4 Circuit High |
| C12A7 Brake Boost Solenoid Valve Circuit Performance |
| C12B1 ABS Master Cylinder Pressure Sensor and Brake Pedal Position Sensor Not Plausible |
| C12B2 Master Cylinder Pressure Sensor Short to Ground or Open |
| C12B3 Master Cylinder Pressure Sensor Short to Battery |
| C12B4 Master Cylinder Pressure Sensor Erratic |
| C12B6 High Pressure Accumulator Pressure Sensor Short to Ground or Open |
| C12B7 High Pressure Accumulator Pressure Sensor Short to Battery |
| C12B8 High Pressure Accumulator Pressure Sensor Erratic |
| C12B9 ABS Regenerative Axle Pressure Sensor Circuit Open or Short To Ground |
| C12BA ABS Regenerative Axle Pressure Sensor Circuit Short To Battery |
| C12BB ABS Regenerative Axle Pressure Sensor Erratic |
| C12BC Brake Boost Regulation Pressure Sensor Short to Ground or Open |
| C12BD Brake Boost Regulation Pressure Sensor Short to Battery |
| C12BE Brake Boost Regulation Pressure Sensor Erratic |
| C12C2 ABS Left Front Isolation Solenoid Valve Driver Shorted |
| C12C5 ABS Right Front Isolation Solenoid Valve Diver Shorted |
| C12C6 ABS Left Rear Isolation Solenoid Valve Circuit Failure |
| C12C8 ABS Right Rear Isolation Solenoid Valve Circuit Failure |
| C12CC ABS Left Front Dump Solenoid Valve Driver Shorted |
| C12CF ABS Right Front Dump Solenoid Valve Driver Shorted |
| C12D0 ABS Left Rear Dump Solenoid valve Circuit Open |
| C12D1 ABS Left Rear Dump Solenoid Valve Circuit Shorted |
| C12D2 ABS Left Rear Dump Solenoid Valve Driver Shorted |
| C12D3 ABS Right Rear Dump Solenoid Valve Circuit Open |
| C12D4 ABS Right Rear Dump Solenoid Valve Circuit Shorted |
| C12D5 ABS Right Rear Dump Solenoid Driver Shorted |
| C12D6 ABS Base Brake Open Solenoid Circuit Open |
| C12D7 ABS Base Brake Open Solenoid Circuit Shorted |
| C12D8 ABS Base Brake Open Solenoid Driver Shorted |
| C12D9 ABS Base Brake Closed Solenoid Circuit Open |
| C12DA ABS Base Brake Closed Solenoid Circuit Shorted |
| C12DB ABS Base Brake Closed Solenoid Driver Shorted |
| C12DC Brake Boost Solenoid Valve Circuit Malfunction |
| C12DD Brake Boost Solenoid Valve Circuit Shorted |
| C12DE ABS Proportioning Valve Solenoid Circuit Open |
| C12DF ABS Proportioning Valve Solenoid Driver Shorted |
| C12E4 Device Voltage Reference Output Circuit |
| C12E6 Valve Relay Contact Circuit Open |
| C12E7 Valve Relay Contact Circuit Resistance Below Threshold |
| C12F2 ABS Left Rear Isolation Solenoid Valve Circuit Shorted |
| C12F3 ABS Left Rear Isolation Solenoid Circuit Performance |
| C12F4 ABS Proportioning Valve Solenoid Performance |
| C12F5 ABS Right Rear Isolation Solenoid Circuit Shorted |
| C12F6 ABS Right Rear Isolation Solenoid Performance |
| C12F7 ABS Boost Pressure Sensor and Regenerative Axle Pressure Sensor Not Plausible |
| C12F8 Brake Pedal Position Sensor 3 Not Plausible |
‘U’ (Network communication) fault codes :
| U1000 Class 2 Communication Malfunction |
| U1001 Lost Communication with XXX |
| U1016 Loss of Communications with PCM |
| U1017 Lost Communication With Engine Control Module |
| U1024 Lost Communication With Transmission Control Module |
| U1026 Loss of ATC Class 2 Communication |
| U1040 Lost Communication With Electronic Brake Control Module |
| U1041 Loss of Electronic Brake Controller Communication |
| U1048 No Communication With Rear Wheel Steering Control Module |
| U1064 Lost Communications with BCM |
| U1088 No Communication With SDM (Restraint Module) |
| U1092 Loss of VTD (Pass Lock) Communication |
| U1096 No Communication With Instrument Panel Cluster |
| U1097 No Communication With Driver Information Center |
| U1098 Loss of HUD Communications |
| U1099 Loss of HUD Communications |
| U1111 Lost Communication With Chime Module |
| U1128 Lost Communications With Radio |
| U1129 Loss of AMP Communications |
| U1133 Lost Communication With DVD Player |
| U1136 Lost Communications With Digital Audio Broadcast |
| U1137 Lost Communication With Digital Radio Receiver |
| U1144 Loss of PHN Communications |
| U1147 Lost Communication With Onstar |
| U1151 No Communication With Vehicle Interface Unit |
| U1152 No Communication With HVAC Control Module |
| U1153 Lost Communication With Climate Control Panel |
| U1160 Loss of DDM Communications |
| U1161 Loss of PDM Serial Data |
| U1162 Lost Communications With Convenience Control System |
| U1166 Lost Communications With Memory Seat Module |
| U1167 Lost Communications With Rear Seat Audio/Rear HVAC |
| U1173 Lost Communications With Moveable Roof Module |
| U1176 Loss of RFA Communications |
| U1192 Loss of Communications with VTD |
| U1193 Loss of Vehicle Immobilizer Module Communications |
| U1241 Lost Communication With Scan Tool |
| U1254 Lost Communication with XXX |
| U1255 Class 2 Communications Malfunction |
| U1300 Class 2 Data Link Low |
| U1301 Class 2 Data Link High |
| U1305 Class 2 Data Link High or Low |
| U1500 Communication (Front to Rear) State of Health |
| U1800 CAN Message Not Received FICM |
| U180F Control Module Communication Bus B Off |
| U1842 Lost Communication With ECM/PCM |
| U1843 Lost Communication With ECM/PCM |
| U186A Lost Communication With Transfer Case Control Module |
| U186B Lost Communication With TCM |
| U1881 Electro-Hydraulic Power Steering (EHPS) Module Lost Communication With Energy Storage Control Module (ESCM) |
| U1882 Energy Storage Control Module (ESCM) Lost Communication With Electro-Hydraulic Power Steering (EHPS) Module |
| U1883 Hybrid Control Module (HCM) Lost Communication With Driver Door Module (DDM) |
| U1884 Hybrid Control Module (HCM) Lost Communication With Passenger Door Module (PDM) |
| U1885 Energy Storage Control Module (ESCM) Lost Communication With Hybrid Control Module (HCM) |
| U1886 Energy Storage Control Module (ESCM) Lost Communication With Powertrain Control Module (PCM) |
| U1887 Energy Storage Control Module (ESCM) Lost Communication With Starter/Generator Control Module (SGCM) |
| U1888 Hybrid Control Module (HCM) Lost Communication With Energy Storage Control Module (ESCM) |
| U1889 Hybrid Control Module (HCM) Lost Communication With Body Control Module (BCM) |
| U1890 Hybrid Control Module (HCM) Lost Communication With HVAC Control Module |
| U1891 Hybrid Control Module (HCM) Lost Communication With Instrument Panel Cluster (IPC) |
| U1892 Hybrid Control Module (HCM) Lost Communication With Electro- Hydraulic Power Steering (EHPS) Module |
| U1893 Hybrid Control Module (HCM) Lost Communication With Powertrain Control Module (PCM) |
| U1894 Hybrid Control Module (HCM) Lost Communication With Starter/Generator Control Module (SGCM) |
| U1895 Electro-Hydraulic Power Steering (EHPS) Module Lost Communication With Powertrain Control Module (PCM) |
| U1896 Electro-Hydraulic Power Steering (EHPS) Module Lost Communication With Starter/Generator Control Module (SGCM) |
| U1897 Starter/Generator Control Module (SGCM) Lost Communication With Energy Storage Control Module (ESCM) |
| U1898 Starter/Generator Control Module (SGCM) Lost Communication With Hybrid Control Module (HCM) |
| U1899 Starter/Generator Control Module (SGCM) Lost Communication With Powertrain Control Module (PCM) |
| U2100 Controller Area Network (CAN) Bus Communication |
| U2104 CAN Message Not Received FICM and TCM |
| U2105 TCM Detects Error on CAN Link |
| U2106 CAN Message Not Received from TCM |
| U2107 Lost Communications With Body Control System |
| U2108 Lost Communication With Electronic Brake Control Module (EBCM) |
| U2199 Unassigned |