The P0107 is an OBD-II trouble code that stands for Manifold Absolute Pressure/Barometric Pressure Circuit Low and is triggered when the vehicle’s computer (ECM) detects no output from the MAP sensor.
This code can happen for a variety of reasons, and you need to diagnose the specific cause for this code to be triggered in your situation.
In this article, I will be talking about the P0107 code, its symptoms, causes, and how to fix it.
What Does The P0107 Code Mean?
Diagnostic trouble code P0107 means that a vehicle’s MAP (manifold absolute pressure) sensor isn’t responding as well as it should. So, the ECM/PCM of a car can’t figure out important equations like those that figure out the spark advance, the width of the fuel injector pulse, and the load on the engine.
To understand the effects of this problem, we must first look at how the MAP sensor works. The MAP sensor is made to measure how much vacuum is in an engine’s intake tract and turn this information into voltage. Unfortunately, these sensors can and frequently do degrade over time.
In the case of the P0107 code, the affected vehicle’s ECM or PCM cannot verify the presence of voltage on the MAP sensor’s signal wire. Most of the time, this signal is sent as a resistive voltage that comes from a car’s 5-volt reference circuit.
As a result, the check engine light on a car illuminates. Also, affected vehicles often have trouble driving, like stalling or starting.
Which Models Are Affected By The P0107 Code
| Make | Affected By P0107 Code |
|---|---|
| Toyota | Yes |
| Nissan | Yes |
| Chevrolet | Yes |
| BMW | Yes |
| Audi | Yes |
| Buick | Yes |
| Mercedes | Yes |
| GMC | Yes |
| Suzuki | Yes |
| Tata | Yes |
| Lexus | Yes |
| Mazda | Yes |
| Mitsubishi | Yes |
| Kia | Yes |
| Jeep | Yes |
| Fiat | Yes |
| Honda | Yes |
| Hyundai | Yes |
| Opel | Yes |
| Ford | Yes |
| Fiat | Yes |
| Peugeot | Yes |
What Are The Possible Causes of the P0107 Code?
The P0107 trouble code is caused when the vehicle’s computer (ECM) detects that the MAP sensor isn’t responding (it doesn’t send any output).
Diagnostic problem code P0107 might have multiple underlying causes, which often vary from case to case. Yet, there are several possible reasons for the P0107 code that are common enough to warrant suspicion whenever such problems develop.
All possible causes of the P0107 error code are listed below.
- The problem is caused by the fact that the sensor range voltage input is less than what the ECU needs.
- Most of the time, the MAP sensor is damaged.
- The wiring or connector could be damaged or have a bad connection, or it could be too close to components that use more voltage, like alternators, ignition wires, etc., which causes the wrong voltage to come out. A bad electrical ground can also make things go wrong.
- The sensor itself might be working out of range because its internal parts have worn out.
- MAP sensors must work within certain ranges to send the right signals so that the ECU can work with the throttle position sensor to make the proper adjustments for the engine to run properly. P0107 may be related to other codes.
- If the engine is not in good shape, is missing, has low fuel pressure, or has an internal problem like a burned valve, these things can stop the MAP sensor from putting out the right amount of voltage. The ECU could also be broken, but this is not common.
What Are The Common Symptoms of The P0107 Code?
Diagnostic trouble code P0107 often comes with several additional symptoms. Even though not everyone will have all of these symptoms, they are common enough that you should pay attention to them.
Here are the most common symptoms of the P0107 code:
- The Check engine light comes on the vehicle dashboard display
- Difficulties to start the vehicle
- Extended crank times
- Black or dark-colored exhaust smoke
- Stalling
- Reduced fuel mileage
- Poor Idle
- Decreased response to throttle demand
Is It Safe To Drive With a P0107 Code
No, it’s not safe to drive with a P0107 code, as it could lead to further damage to the power unit. The engine might run rough, the car might use more gas, and the vehicle might not be as stable.
MAP sensor circuit problems have been known to cause an unsteady idle or even a lack of response to the throttle, which makes driving the car at best very risky.
In the same way, problems with the MAP sensor circuit can cause a car to stall or even stop it from starting. This can be a very troubling set of events to deal with.
In any case, all problems related to the P0107 code should be checked out carefully and fixed as soon as possible to avoid downtime and extra costs.
How To Diagnose The P0107 Code
To diagnose the P0107 code, you should:
- Scan for codes in the engine control module (ECM) and examine the stored data P0107.
- Test manifold absolute pressure (MAP) sensor continuity and output voltage.
- If a harness/wiring check is required, go to step 1 of the Repair Procedure. If no codes or stored data are discovered, continue to the next step.
- While applying the vacuum, check for voltage drop at the manifold absolute pressure (MAP) sensor terminals (or remove the vacuum).
- Repair as required
- Inspect for shorted circuit components or ECM PCM failure
- Replace pulse-code modulation (PCM) if no short is observed in the circuit or if the problem persists after repair
- If the issue is fixed after replacing the PCM, check for other codes in the ECM.
Most Common Mistakes When Diagnosing The P0107 Code
The majority of diagnostic errors result from not following the suggested method. First, perform the test procedure in the diagnosis to check that the sensor and ECU are receiving the right voltage.
The technician must ensure that the voltage output of the MAP sensor is within the required range, varies with engine speed, and has the correct voltage. Typical idle voltage is between 1 and 1.5 volts, whereas full throttle voltage is around 4.5 volts.
Get a new MAP Sensor or ECU only if the existing one is obviously defective.
How Much Does It Cost To Repair P0107 Code
| Make | P0107 Code | Repair Cost |
|---|---|---|
| Toyota | Yes | $16 – $45 |
| Nissan | Yes | $16 – $45 |
| Chevrolet | Yes | $16 – $45 |
| BMW | Yes | $16 – $45 |
| Audi | Yes | $16 – $45 |
| Buick | Yes | $16 – $45 |
| Mercedes | Yes | $16 – $45 |
| GMC | Yes | $16 – $45 |
| Suzuki | Yes | $16 – $45 |
| Tata | Yes | $16 – $45 |
| Lexus | Yes | $16 – $45 |
| Mazda | Yes | $16 – $45 |
| Mitsubishi | Yes | $16 – $45 |
| Kia | Yes | $16 – $45 |
| Jeep | Yes | $16 – $45 |
| Fiat | Yes | $16 – $45 |
| Honda | Yes | $16 – $45 |
| Hyundai | Yes | $16 – $45 |
| Opel | Yes | $16 – $45 |
| Ford | Yes | $16 – $45 |
| Fiat | Yes | $16 – $45 |
| Peugeot | Yes | $16 – $45 |
What Repairs Can Fix The P0107 Code?
The most common repairs that can fix the P0107 code are as follows:
- Check the code using an OBD-II scanner. Reset the error codes, then conduct a road test.
- If the P0107 code returns, repeat the test procedure.
- Inspect the input and output voltage of the MAP sensor as well as the electrical connector and wiring. To ensure a clean and fresh electrical connection, disconnect and reinsert the electrical connector. Then, verify that the MAP sensor’s voltage output is within the acceptable range.
- Determine whether the MAP sensor is malfunctioning and if it has no output or an inaccurate output, replace the sensor. If all checks pass, a final test must be performed to establish whether the ECU is defective.
How To Fix The P0107 Code
The following steps can be utilized to assist in resolving the cause of the P0107 code on your car. Before attempting such repairs, it is always strongly recommended that you study the manufacturer-specific service manual for your car.
Here is how to fix the P0107 code:
- Replace the Map sensor
- Replacing the PCM or ECM
- Repairing wiring/harness
In Conclusion
The P0107 code is a generic trouble code that indicates a fault with the manifold absolute pressure (MAP) sensor. Before replacing the ECM, PCM, or MAP sensor, it is necessary to investigate and test all potential causes of this trouble code.
The P0107 trouble code is significant because it might lead to a loss of power and poor fuel economy. Leaving this code unaddressed may result in more serious issues in the future, such as faulty catalytic converter.