In order to shift an automatic transmission like a manual, a switch connected to the gear lever has to send an electrical signal to the TCM every time you push the shifter in the +/- direction. This tells a sensor on the valve body which gear you would like to engage. If there is an issue with one of the components in the auto shift manual mode circuit, a P0955 DTC will be saved.
What Transmission Do I Have?
How Serious is the Code?
The transmission problems related to a P0955 diagnostic trouble code are not likely to leave you stranded on the side of the road. They will however, prevent you from using the manual shifting function.
Symptoms
Symptoms of a P0955 include:
- Manual shifting function disabled
Causes
- Damaged wiring or connectors
- Failed Autostick transmission shift switch
How to Diagnose the Code?
In order to diagnose a P0955 OBDII trouble code, your mechanic will need to check the shifter mechanism for signs of moisture damage, due to a possible spill around the gear lever. The autostick shift switch should be tested to ensure that it works, and the wiring/connectors should be checked for signs of damage and corrosion.
What Repairs Will Fix P0955?
- Repair or replace damaged wiring and connectors
- Replace Autostick transmission shift switch
Related Codes
N/A
What Transmission Do I Have?
