The P0850 trouble code indicates an issue with the park or neutral switch input circuit. Here’s what you should know:
P0850 Park/Neutral Switch Input Circuit
Code symptoms P0850.
1. Difficulty starting the vehicle.
2. Inability to shift out of park or neutral.
3. Engine stalling when shifting gears.
4. Illumination of the Check Engine Light (CEL) or Malfunction Indicator Lamp (MIL) on the dashboard.
Causes of the code P0850.
1. Faulty park or neutral switch.
2. Damaged or corroded wiring or connectors in the switch circuit.
3. Misalignment of the park or neutral switch.
4. Issues with the transmission range sensor.
5. Faulty transmission control module (TCM).
Code Solutions P0850.
1. Replace the park or neutral switch if it’s found to be faulty.
2. Repair or replace any damaged wiring or connectors in the switch circuit.
3. Adjust or realign the park or neutral switch if necessary.
4. Ensure proper installation of the park or neutral switch and secure any wiring harnesses.
5. Reset the fault codes and test drive the vehicle to verify that the issue has been resolved.