DTC P0108
DTC P0108: Manifold Absolute Pressure (MAP) Sensor Circuit High Voltage
General Description
The manifold absolute pressure (MAP) sensor measures the pressure or vacuum in the manifold. This measurement is converted into an electrical signal which the powertrain control module (PCM) uses to monitor the engine. The MAP sensor outputs low signal voltage at high vacuum (throttle valve closed) and high signal voltage at low vacuum (throttle valve wide open). If the signal voltage from the MAP sensor exceeds a set value for a specified time, the PCM detects a malfunction and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type, OBD Status
| Execution | Continuous |
| Sequence | None |
| Duration | 2 seconds or more |
| DTC Type | One drive cycle, MIL on |
| OBD Status | PASSED/FAILED/NOT COMPLETED (STILL TESTING) |
Enable Conditions
| Condition | |
|---|---|
| Ignition switch or Engine start/stop button | Vehicle ON mode |
| No active DTCs set (prevents monitor from running) | P0107 |
Malfunction Threshold
The MAP sensor output voltage [MAP SENSOR] is 4.49 V or more for at least 2 seconds.
[ ]: HDS Parameter
Possible Cause
- MAP sensor PB line open
- MAP sensor SG line open
- MAP sensor failure
- PCM internal circuit failure
Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected, the MIL comes on and a Pending DTC, a Confirmed DTC, and the freeze data are stored in the PCM memory.
Conditions for clearing the DTC
The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the battery.