On vehicles equipped with electronic traction control, the gear shift module communication circuit relays information about your gear selection to the ECU, so it can decide on shift timing, engine timing, delivery and other important aspects of your vehicle. If the ECU does not receive the expected information from this data pipeline, a P0862 DTC will be triggered.
How Serious is the Code?
A P0862 diagnostic trouble code is quite serious, because it means that the computer cannot communicate with the necessary sensors and control modules. Needless to say, this will affect the drivability, and possibly the safety of your vehicle.
Symptoms of a P0862 include:
- Warning light for traction control
- Hard shifting
- Transmission won’t shift into or out of gear
- Limp mode
- Wiring and/or connector damage
- Manual lever position sensor has failed
- Damaged or broken gearshift assembly
How to Diagnose the Code?
When trying to figure out what is causing a P0862 OBDII trouble code, the wiring and connectors on the transmission wiring harness are typically checked first. If nothing is found to be wrong, then the manual lever position sensor, and possibly the gear shifter assembly should be considered.
What Repairs Will Fix P0862?
- Repair or replace damaged wiring on the transmission wiring harness
- Replace or repair broken/corroded connectors
- Replace transmission control module