Powertrain
generic / SAE
P0815
Upshift Switch Circuit
The TCM detects an electrical fault on the manual upshift request switch (paddle or +/- lever) circuit.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number8 / 15
Possible causes
- Switch contacts failed high
- Wiring open 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: upshift switch
- Component: wiring harness
- MIL / check engine light
Sources
References
sae:J2012