P0790Normal/Performance Switch Circuit
- Generic OBD-II code · Powertrain
- How the car detects it
- P0790 is the circuit fault of the normal/performance (sport or power program) selector of an automatic transmission – the older single code that preceded the mode switch codes P071A ff; the early J2012 list still called it 'circuit malfunction'. The switch is usually a button to ground or a resistor ladder; a fault is an invalid level, a permanently pressed button or an open circuit. No manufacturer document available to us describes it; GM uses P05D0–P05D3 for its drive mode selector today. The sport program is then unavailable or permanently on.
- What you may notice
- Sport or performance program unavailable or always on
- Mode indicator missing or flashing
- Likely causes
- LikelyButton faulty or sticking
- PossibleWire or connector open or shorted
- PossibleLiquid in the console
- RareControl module
- Repair
- Easy · Often possible to do yourself.Typical cost: €40 – €250
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.