P0850

P0850-PARK/NEUTRAL SWITCH PERFORMANCE

For a complete wiring diagram refer to the Wiring Information Electrical Diagrams.

Theory of Operation

The transmission PRNDL diagnostics will detect transmission stuck in park error, if the vehicle speed is greater than a calibrated threshold and selected gear is PARK according to the received CAN message. It will also detect transmission stuck in drive error, if the engine crank state is seen while the selected gear is DRIVE according to the received CAN message.

- When Monitored:
While the key is on.

- Set Condition:
The transmission module has a transmission related fault.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Pre-Diagnostic Troubleshooting Procedure
TRANSMISSION STUCK IN PARK OR DRIVE

See repair.

Repair

- Repair the transmission/CAN related problem.