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 and all manual trans) 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/wires
- Disconnected wiring harness
- Park/neutral position switch failure
- Mechanical transmission problem
- Powertrain control module failure