P2847Shift Fork C Position Sensor Incorrect Neutral Position Indicated
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- With P2847 the module has decided that the neutral signal from the fork C sensor cannot be trusted. Before a dual-clutch or automated manual box preselects a gear on a shaft, it must know that the other forks on that shaft are out; a false neutral could let two ratios mesh at once, so the module normally locks the affected gears out. No published manufacturer strategy uses P2847, so the code rests on the general CARB 13 CCR 1968.2 demand for plausible transmission inputs. In GM's Corvette software, the comparable static check for the third rod, which sits on the even shaft, is filed as P283C. Typical background: sensor or magnet moved during a transmission repair, positions never relearned, or a fork bent by a hard shift.
- What you may notice
- Gears of fork C locked out, jumps between remaining ratios
- Warning lamp and stored transmission code
- Harsh or delayed shifts on the affected shaft
- Likely causes
- LikelyFork C sensor or magnet repositioned during transmission work without relearn
- PossibleFork C bent, so neutral lies outside the learned band
- RarePosition sensor output drifting with temperature or age
- 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 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.