DTC Advanced Diagnostics: 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
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

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.

	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 12 volt battery.