In order to provide manual control of an automatic transmission, a number of sensors, actuators and wires are used. If one of the components within this circuit are not performing according to the preprogrammed parameters, a P0956 DTC will be saved.
How Serious is the Code?
If your vehicle has a P0956 diagnostic trouble code, probably won’t have to call a tow truck. However, you probably won’t be able to manually control the transmission using the manual shift gate or paddle shifters.
Symptoms of a P0956 include:
- Disable manual shifting function
- Corroded or broken connectors
- Wiring damage
- Failed Autostick transmission shift switch
How to Diagnose the Code?
Diagnosing a P0956 OBDII code generally involves inspecting the shifting mechanism for signs of water damage/corrosion around the connectors and the autostick switch. The transmission shift switch itself should be tested to make sure that it works, and all the wiring should be inspected for signs of damage.
What Repairs Will Fix P0956?
- Repair or replace damaged wiring and connectors
- Replace Autostick transmission shift switch