Vehicles with manual-shift automatic transmissions allow you to manually downshift and upshift, thanks to a number of transmission parts that include a switch on the gear selector, an actuator, and a bunch of wiring. A DTC P0951 means that a component in this collective circuit is not functioning according to preprogrammed parameters.
How severe is the code?
Diagnostic code P0951 is not particularly severe. However, you will not be able to manually control gear shifts using the manual gear selector or paddles.
Symptoms
Symptoms of a P0951 include:
- Manual shifting function is disabled
Causes
- Damaged wiring and/or connectors
- Failure of the shift switch
How to diagnose the code?
The diagnostic process for an OBDII fault code P0951 usually begins with an inspection of the wiring and connectors around the shift assembly. If no broken/frayed cables are corroded/broken, then the manual shift switch on the transmission/up and down shift switch should be tested and checked for signs of water damage.
What repairs will fix P0951?
- Repair or replace damaged wiring and connectors
- Replace the transmission shift switch