P0850-PARK/NEUTRAL SWITCH PERFORMANCE
For a complete wiring diagram, refer to the Wiring Information.
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When Monitored:
With the ignition on and the CAN BUS active.
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Set Condition:
The Powertrain Control Module (PCM) receives a CAN message from the Transmission Control Module that there is a Park/Neutral Switch error.
Possible Causes |
|---|
| CAN BUS COMMUNICATION ERROR |
| PARK/NEUTRAL SWITCH |
| TRANSMISSION CONTROL MODULE (TCM) |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
DTC IS ACTIVE
| NOTE: | Diagnose any CAN B or CAN C communication DTCs before proceeding. |
| 1. | Ignition on, engine not running. |
| 2. | With the scan tool, view DTCs in the PCM. |
Is the status Active for this DTC?
Yes
- (Refer to 28 - DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Diagnosis and Testing) and perform the appropriate diagnostic procedure.
No
- Perform the INTERMITTENT DTC diagnostic procedure. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).