Here's what it means:
* MAP Sensor: This sensor measures the pressure inside the engine's intake manifold, which is related to the engine load and air density. This information is crucial for the engine control unit (ECU) to calculate the correct amount of fuel to inject.
* High Input: The code means that the signal from the MAP sensor is too high, indicating a potential problem with the sensor itself, its wiring, or a vacuum leak in the intake manifold.
Possible Causes:
* Faulty MAP sensor: The sensor might be malfunctioning and providing inaccurate readings.
* Damaged wiring: A short circuit or open circuit in the sensor wiring can cause the high input issue.
* Vacuum leak: A leak in the intake manifold or vacuum lines can cause a higher-than-expected pressure reading.
* Faulty PCM (Powertrain Control Module): In rare cases, the PCM itself might be faulty and misinterpreting the MAP sensor signal.
Troubleshooting Steps:
1. Check for vacuum leaks: Inspect the intake manifold, vacuum lines, and hoses for any cracks, holes, or loose connections. Use a vacuum gauge to check for leaks.
2. Inspect the MAP sensor: Check the sensor for any damage or corrosion. Make sure the sensor is properly connected and the wiring is intact.
3. Test the MAP sensor: Use a multimeter to measure the sensor's resistance and voltage output. Compare the readings to the manufacturer's specifications to determine if the sensor is faulty.
4. Scan for other codes: There might be other codes related to the P0108, which can provide additional clues about the problem.
5. Inspect the PCM: If the sensor and wiring are all in good condition, you may need to check the PCM for any faults.
Note: Always consult your vehicle's repair manual or a trusted mechanic for specific repair instructions and safety precautions.
