Grand Prix V6-191 3.1L VIN M SFI (1998)
EGR Pintle Position Sensor: Description and Operation
Linear EGR Valve
DESCRIPTION
The EGR pintle position sensor is an integral part of the EGR valve assembly. This sensor can not be serviced separately from the EGR valve
assembly.
OPERATION
The PCM monitors the EGR valve pintle position input to ensure that the valve responds properly to commands from the PCM and to detect a fault if
the pintle position sensor and control circuits are open or shorted. If the PCM detects a pintle position signal voltage outside the normal range of the
pintle position sensor, or a signal voltage that is not within a tolerance considered acceptable for proper EGR system operation, the PCM will set DTC
P1406.
