For 1990-2009 cars

The manifold absolute pressure (MAP) sensor is a transducer that varies resistance according to changes in intake manifold pressure (vacuum). The PCM measures the signal voltage from the MAP sensor, which is a reduced value of the PCM 5 volt reference. The voltage ranges from 1-1.5 volts at idle (low pressure/high vacuum) to 4.5-4.8 volts at wide open throttle (high pressure/low vacuum). DTC P0107 sets when the MAP sensor signal voltage at the PCM is below the calibrated voltage value.

### Conditions for Setting the DTC

DTC P0107 will set if MAP sensor voltage is less than 0.1 volts when:

• | The condition exists for longer than 6 seconds.

• | Engine speed is less than 1,000 RPM.

• | No TP sensor DTCs have been set.

| OR

• | The condition exists for longer than 6 seconds.

• | Engine speed is greater than 1,000 RPM.

• | The TP angle is greater than 15 percent.

• | No TP sensor DTCs have been set.

DTC P0107 diagnostic runs continuously with the engine running.

DTC P0107 is a type B DTC

### Diagnostic Aids

To locate an intermittent problem, use the scan tool to monitor MAP sensor voltage with the engine idling (high vacuum). Wiggling the wires while watching for a change in MAP sensor voltage may locate the area where an open or short to ground in the wiring could lie.

Important: Inaccurate readings will occur if resistance measurements are taken on a MAP sensor. The MAP sensor contains an internal amplifier circuit that requires applied voltage to function properly.

The PCM supplies the MAP sensor with its own separate 5 volt reference source. There are no other external components tied to it.