The manifold absolute pressure (MAP) sensor is a transducer that varies resistance according to changes in intake manifold pressure (vacuum). The powertrain control module 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 4-4.5 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.
DTC Parameters
DTC P0107 will set if MAP sensor voltage is less than 0.2 volts when:
| • | The condition exists for longer than 6 seconds. |
| • | The engine speed is less than 1600 RPM. |
| • | The throttle position (TP) angle is greater than 0 percent. |
| • | No TP sensor DTCs have been set. |
OR
| • | The condition exists for longer than 6 seconds. |
| • | The engine speed is greater than 1600 RPM. |
| • | The TP angle is greater than 15 percent. |
| • | No TP sensor DTCs have been set |
DTC P0107 diagnostic runs continuously once the above conditions have been met with ignition ON.
DTC P0107 is a type A DTC.
Diagnostic Aids
Important: If DTC P1635 is set, diagnose that first.
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.
To locate an intermittent problem, use scan tool to monitor MAP voltage with engine idling (high vacuum). Wiggling the wires while watching for a change in MAP voltage may locate the area where an open or short to ground in the wiring could lie.
