DTC P0106: Map/TP Sensor Performance/Range: Description

WARNING: This page is about a different car, the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, and 2002 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.

The Throttle Position (TP) sensor is a potentiometer. The Powertrain Control Module (PCM) supplies about 5 volts on the TP sensor reference voltage circuit. The PCM also supplies a ground circuit to the TP sensor. When the throttle is depressed the TP signal voltage rises to near the supplied 5 volts. As the throttle is released, the TP signal voltage drops to around 0.6 volt. The PCM and AF ECM monitor the TP signal circuit voltage and determine the angle (or opening) of the throttle blade.

The Manifold Absolute Pressure (MAP) sensor is a pressure sensor, located on top of intake manifold. The PCM supplies about 5 volts on the MAP sensor reference voltage circuit. The PCM also supplies a ground circuit to the MAP sensor. When manifold vacuum is low the MAP signal voltage rises to near 4.5 volts. As manifold vacuum increases the MAP signal voltage drops to around 1 volt. The PCM and the AF ECM monitor the MAP signal circuit voltage and determine the vacuum within the intake manifold.

Certain vehicle models will also use the MAP sensor in order to determine the barometric pressure when the ignition switch is turned ON and the engine is NOT cranked. This BARO reading may also be updated whenever the engine is operated at wide open throttle.

This DTC is used to indicate a MAP sensor signal voltage that does not change when TP sensor voltage changes.