A manually shiftable automatic transmission or automated manual transmission, has to be able to communicate with the engine computer so it knows how to setup the engine for optimum performance and efficiency. A P0826 DTC means that there is a problem with the circuit the up and down switch operates.
How Serious is the Code?
Having a P0826 diagnostic trouble code doesn’t mean that your vehicle is about to leave you stranded. However, you probably won’t be able to manually control the transmission.
Symptoms of a P0826 include:
- Harsh shifting
- Disabled manual shift function
- Limp mode
- Damaged wiring or connectors
- Damaged or defective up and down shift switch
How to Diagnose the Code?
It’s not uncommon for electrical problems to be the cause of a P0826 OBDII trouble code, so the wiring and connectors need to be carefully examined for signs of damage. If no problems are found, the up/down shift switch will need to be tested.
What Repairs Will Fix P0826?
- Repair or replace damaged wiring and connectors
- Replace up and down shift switch
P0827 – Up and Down Shift Switch Circuit Low