Error Code P0108
Moderate Issue
DTC Code P0108 indicates a high input in the Manifold Absolute Pressure/Barometric Pressure Circuit, where the MAP sensor voltage exceeds 4.50 V for more than 13 ms, suggesting abnormal pressure readings in the intake manifold.
What symptoms indicate Error Code P0108?
- Engine Light ON: The check engine light or service engine soon warning light illuminates, indicating a potential issue with the manifold absolute pressure (MAP) sensor circuit.
- Engine Rough Idle: The engine may experience a rough idle, which can be linked to incorrect air-fuel mixture due to high input from the MAP sensor.
- Engine Hesitation: There may be noticeable hesitation during acceleration, often caused by improper air-fuel ratio resulting from the MAP sensor's high input signal.
What causes OBD code Error Code P0108?
- The Manifold Absolute Pressure (MAP) sensor may be malfunctioning, leading to incorrect pressure readings.
- An open or shorted MAP sensor harness can disrupt the signal transmission, causing high input readings.
- Poor electrical connections in the MAP sensor circuit can result in intermittent or incorrect data being sent to the ECM.
- A faulty Engine Control Module (ECM) might misinterpret the sensor data, leading to erroneous pressure readings.
How to fix OBD code Error Code P0108?
- Verify DTC Code: Confirm the presence of DTC P0108 using an OBD-II scanner. Check for any additional codes that may be present, such as P0107 or P0109, which could provide further context.
- Inspect MAP Sensor: Visually inspect the Manifold Absolute Pressure (MAP) sensor for any signs of damage, corrosion, or loose connections. Ensure the sensor is securely mounted and the electrical connector is properly attached.
- Check Wiring and Connectors: Examine the wiring harness and connectors leading to the MAP sensor for any signs of wear, fraying, or disconnection. Repair or replace any damaged components as necessary.
- Test MAP Sensor Voltage: Using a multimeter, measure the voltage at the MAP sensor connector. Compare the readings to the manufacturer's specifications to determine if the sensor is functioning correctly.
- Inspect Vacuum Lines: Check the vacuum lines connected to the MAP sensor for any leaks, blockages, or disconnections. Ensure all lines are intact and properly connected.
- Perform ECU Reset: After addressing any identified issues, clear the DTC code from the ECU using the OBD-II scanner. Test drive the vehicle to ensure the code does not return.