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Symptom: P0850-PARK/NEUTRAL SWITCH PERFORMANCE When Monitored and Set Condition: P0850-PARK/NEUTRAL SWITCH PERFORMANCE When Monitored: Continuously with the transmission in Park, Neutral, or Drive and NOT in Limp-in mode. Set Condition: This code will set if the PCM detects an incorrect Park/Neutral switch state for a given mode of vehicle operation. POSSIBLE CAUSES DRB DISPLAYS P/N & D/R NOT IN CORRECT POSITION TRS T41 SENSE (P/N SENSE) CIRCUIT OPEN TRS T41 SENSE (P/N SENSE) CIRCUIT SHORTED TO GROUND TRANSMISSION RANGE SENSOR PCM TEST ACTION APPLICABILITY 1 Ignition on, engine not running. t, read the Park/Neutral Position Switch input state. While moving the gear selector through all gear positions (Park to 1 and back to All Yes → Refer to the INTERMITTENT CONDITION Symptom (Diagnos- tic Procedure). No → Go To 2 2 Turn the ignition off. All Yes → Go To 3 No → Repair the open in the TRS T41 Sense (P/N Sense) circuit. Perform POWERTRAIN VERIFICATION TEST VER - 2. 245 DRIVEABILITY - NGC |