P0957Auto Shift Manual Mode Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- How the car detects it
- Voltage in the manual mode circuit, the signal that reports the selector lever in the manual gate, is below the expected range. Mostly the signal line has a short to ground or the switch contact hangs in its grounded position. A Nissan patent describes a manual mode switch whose moving contact is grounded and explains how the control unit spots a contact shorted to earth from its two inputs. No manufacturer documents this exact code publicly; Hyundai's mode circuit fault appears in Genesis bulletins only as the general code. CARB requires circuit checks on such inputs. P0958 is the high counterpart, P0955 the general and P0956 the plausibility fault. Expect manual mode to be unavailable or stuck on.
- What you may notice
- Manual mode not available or permanently indicated
- Warning lamp depending on manufacturer
- Automatic driving in D unaffected
- Likely causes
- LikelyMode signal wire chafed and shorted to ground
- PossibleMode switch stuck in the grounded position
- PossibleLiquid or dirt in the selector lever housing
- Repair
- Medium · Often possible to do yourself.Typical cost: €40 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.