Powertrain
generic / SAE
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.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number8 / 26
Possible causes
- Switch internal short high
- Wiring shorted between channels medium
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
Inspection / repair
- Difficulty: easy
- DIY: possible
- Estimated cost: 80–350 €
- Estimated time: 0.3–1.5 h
- Component: shift switch assembly
- Component: wiring harness
- MIL / check engine light
Sources
References
sae:J2012