The gear shift module communication circuit relays data about the current gear selection to the ECU, so it can set the shift timing. If there is a communication error between the sensors and the engine computer, a P0861 DTC will be used.
Need a replacement transmission? Get an estimate for replacement transmissions and local installation. Look up your transmission model by vehicle make and model.
What Transmission Do I Have?
How Serious is the Code?
A P0861 diagnostic trouble code is likely to affect the drivability of your vehicle, along with the safety.
Symptoms
Symptoms of a P0861 include:
- Traction control warning light
- Harsh shifts
- Transmission won’t engage gears
- Limp mode
Causes
- Damaged wiring
- Corroded connectors
- Damaged manual lever position sensor
- Damaged gearshift assembly
How to Diagnose the Code?
The first step to diagnosing a P0861 OBDII trouble code, is to carefully inspect the wiring and connectors on the transmission wiring harness. If no damaged wires or connectors are found, then the manual lever position sensor, along with the gear shift assembly should be checked.
Need a replacement transmission? Get an estimate for replacement transmissions and local installation. Look up your transmission model by vehicle make and model.
What Transmission Do I Have?
What Repairs Will Fix P0861?
- Repair or replace damaged wiring on the transmission wiring harness
- Replace or repair broken/corroded connectors
- Replace transmission control module
Related Codes
N/A
