P2E12Gear Selection Actuator Position Sensor Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2E12 sets when the signal of the gear selection actuator's position sensor stays below the lowest valid level. Usual reasons are a short to ground on the signal line, a missing 5 V reference or a defect inside the sensor; with many designs an interrupted signal wire also reads low. No manufacturer documents P2E12 publicly. For a comparable digital rod position sensor, GM's 2023 dual-clutch TCM tables (P2833) give concrete limits: no pulses while the pin sits below 2000 mV, or a duty cycle under 8 %, confirmed after 150 ms with a supply between 4.5 and 5.5 V, Type A. CARB calls for out-of-range checks on such transmission inputs. If several sensors share the reference, other codes often appear at once. The high counterpart is P2E13; the gearbox usually falls back to a safe gear.
- What you may notice
- MIL and transmission warning immediately
- Limp mode, no gear changes or only one gear
- Further sensor codes if the shared 5 V supply is affected
- Likely causes
- LikelySignal wire chafed through and shorted to ground
- Possible5 V reference missing or pulled down by another sensor on the same supply
- PossibleSignal wire or terminal interrupted
- RareInternal short in the position sensor
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €80 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.