P0956Auto Shift Manual Mode Circuit Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Needs a drive cycle to confirm a fix
- How the car detects it
- The manual mode signal is electrically valid but contradicts other information, for example manual mode reported while the range sensor reads P, R or N, or the mode switch never changing although the up/down requests arrive. A Hyundai patent uses a microswitch with two opposing contacts and treats identical or missing signals on both inputs as a defect; a Nissan patent likewise compares two contacts of the manual mode switch. No manufacturer documents this exact code publicly, and Hyundai's mode circuit fault is only documented as the general code P0955. CARB requires rationality checks on such inputs. P0957 to P0959 cover low, high and intermittent faults. Manual mode is usually blocked.
- What you may notice
- Manual mode drops out or will not engage
- Display shows manual mode while lever is in D, or the reverse
- Warning lamp depending on manufacturer
- Likely causes
- LikelyMode switch or its actuating foot misaligned on the lever
- PossibleWorn switch contacts giving contradictory states on both inputs
- PossibleTransmission range sensor out of adjustment, disagrees with the mode signal
- RareWorn selector lever bushings allowing side play
- Repair
- Medium · Often possible to do yourself.Typical cost: €50 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.