OBD-II code · Powertrain (generic)
P0826 Up and Down Shift Switch Circuit
The TCM detects a fault in the combined up/down shift switch circuit, where both switch states are simultaneously active or both inactive when activity is expected.
Is it safe to drive with P0826?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySwitch internal short
- PossibleWiring shorted between channels
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–1.5 h
- Emissions test
- Usually unaffected
- Parts involved
- Shift Switch Assembly, Wiring Harness
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.