Selecting a gear with your shifter sends a signal to the ECU, which it then interprets to set up the engine and transmission to best match your selected gear. If the computer thinks that your gear choice is not appropriate for what the vehicle is doing (based on data from speed sensors and other components), a P2794 DTC will be triggered.
How Serious is the Code?
A P2794 diagnostic trouble code means that the computer is using incorrect data to determine things like shift strategy and fuel delivery. This can obviously impact drivability, with transmission problems like unusually harsh shifts, erratic transmission behavior and failed gear engagement.
Symptoms of a P2794 include:
- Harsh shifts
- Erratic shifts
- Delayed gear changes
- Failed gear engagement
- Poor performance
- Stuck in a gear
- Limp Mode
- Damaged wiring and/or connectors
- Failed shifter assembly or components
- Failed/misadjusted transmission range sensor
How to Diagnose the Code?
Many times, a P2794 OBDII trouble code can be caused by a failed shifter assembly or transmission range sensor. It can also be caused by something as simple as a shorted wire or corroded connector.
What Repairs Will Fix P2794?
- Repair/replace damaged wiring or connectors
- Replace shifter assembly
- Adjust or replace transmission range sensor