Powertrain
generic / SAE
P0790
Normal/Performance Switch Circuit
General electrical fault on the Normal/Performance shift-pattern selector switch — lets the driver toggle between a comfort-oriented and a sport-oriented shift map. Without a valid input the TCM defaults to the Normal map.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number7 / 90
Possible causes
- Open or shorted switch wire high
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: medium
- DIY: possible
- Estimated cost: 60–350 €
- Estimated time: 0.3–1.5 h
- Component: performance switch
- Component: wiring harness
- MIL / check engine light
Sources
References
sae:J2012