The manual shift automatic control circuit/Autostick manual control circuit consists of sensors, wires, and connectors that allow you to manually control your automatic transmission. A DTC P0953 means there is an abnormally high voltage signal somewhere in this circuit.
How severe is the code?
Diagnostic code P0953 does not mean you will be stranded on the side of the road. However, it does mean you will not be able to manually control gear shifts.
Symptoms
Symptoms of a P0953 include:
Manual shift function is disabled
Causes
Damaged connectors and/or wiring
Shift switch failure
How to diagnose the code?
The process of determining the cause of a P0953 OBDII trouble code usually begins with inspecting the entire shift lever assembly. Water damage to the Autostick switch and connectors is a common cause. Wiring should also be checked for damage such as frayed or broken wires.
What repairs will fix P0953?
Repair or replace damaged wiring and connectors
Replace the transmission shift switch