The P0855 trouble code indicates that there is a high input signal detected from the drive switch circuit. Here’s what you should know:
P0855 Drive Switch Input Circuit High
Code symptoms P0855.
1. Difficulty starting the vehicle.
2. Inability to shift into or out of drive.
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 P0855.
1. Faulty drive switch.
2. Damaged or corroded wiring or connectors in the switch circuit.
3. Misalignment of the drive switch.
4. Issues with the transmission range sensor.
5. Faulty transmission control module (TCM).
Code Solutions P0855.
1. Replace the drive 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 drive switch if necessary.
4. Ensure proper installation of the drive switch and secure any wiring harnesses.
5. Reset the fault codes and test drive the vehicle to verify that the issue has been resolved.