An up and down shift switch tells vehicle computer what gear you have manually selected with either the shifter or the paddle shifters. A P0827 DTC means there is a low voltage situation on the circuit this switch operates on.
How Serious is the Code?
A P0827 diagnostic trouble code might only affect the manual shifting capability of your transmission. But that can cause drivability issues like hard shifts in limp mode.
Symptoms of a P0827 include:
- Unusually hard shifts
- Manual shifting function will not work
- Limp mode
- Damaged wiring
- Corroded connectors
- Broken upshift/downshift switch
How to Diagnose the Code?
Diagnosing a P0827 OBDII trouble code involves carefully checking the wiring and connectors on the transmission wiring harness. If no problems are found there, the up/down shift switch will need to be checked.
What Repairs Will Fix P0827?
- Repair or replace damaged wiring and connectors
- Replace up and down shift switch
P0826: Up and Down Shift Switch Circuit