Park/Neutral Switch Failure

NAME OF CODE
Park/Neutral Switch Failure (Sense Circuit)

WHEN MONITORED
With the transmission in Park, Neutral, or Drive and not in limp-in mode

SET CONDITION
This code is set if the PCM detects an incorrect Park/Neutral switch state for a given mode of vehicle operation.

THEORY OF OPERATION
The Transmission Range Sensor (Park/Neutral position switch on 3 speed auto, all manual trans, and early 96 MY NS) is used to communicate whether or not the transmission is in Park or Neutral to the PCM. When the transmission is in Park or Neutral the Park/Neutral position switch sense circuit is grounded.

POSSIBLE CAUSES
- Connector terminals and/or wires
- Transmission Range Sensor (or Park/Neutral Position Switch)
- Mechanical transmission problem
- PCM failure