When you put your vehicle in gear, the ECU sees your choice and compares it to data coming in from a number of speed sensors and engine sensors. If the computer thinks that you’ve selected the wrong gear range compared to what the vehicle is currently doing, a P2793 DTC will be set.
How Serious is the Code?
Since the ECU needs the gear shift direction circuit to determine the proper shift strategy and engine setup, a P2793 diagnostic trouble code can be fairly serious. The common transmission problems related to this DTC harsh shifts, poor engine/vehicle performance and failed gear engagement.
Symptoms of a P2793 include:
- Unusually harsh gear changes
- Delayed shifts
- Failed gear engagement
- Poor performance
- Limp Mode
- Damaged wiring/connectors
- Failed shifter assembly or components
- Failed/misadjusted transmission range sensor
How to Diagnose the Code?
A P2793 OBDII trouble code in many cases, can be caused by a shorted wire, damaged connector or failed component inside the shifter assembly. The transmission range selector may have also failed, or is out of adjustment. So all of those areas will need to be checked. Manufacturer TSB’s may also shed light on the issue.
What Repairs Will Fix P2793?
- Repair/replace damaged wiring or connectors
- Replace shifter assembly
- Adjust or replace transmission range sensor