To ensure manual control of an automatic transmission, a number of sensors, actuators, and wires are used. If any component in this circuit does not function according to preprogrammed parameters, a DTC P0956 will be recorded.
How severe is the code?
If your vehicle has a diagnostic code P0956, you probably won’t need to call a tow truck. However, you likely won’t be able to manually control the transmission using the manual gear selector or paddles.
Symptoms
Symptoms of a P0956 include:
- Disabling the manual shifting function
Causes
- Corroded or broken connectors
- Wiring damage
- Failure of the Autostick transmission shift switch
How to diagnose the code?
Diagnosing an OBDII P0956 code typically involves inspecting the shifting mechanism for signs of water damage/corrosion around the connectors and the autostick switch. The transmission shift switch itself must be tested to ensure it is functioning, and all wiring should be inspected for any signs of damage.
What repairs will fix P0956?
- Repair or replace damaged wiring and connectors
- Replace the Autostick transmission shift switch