P283EShift Fork C Position Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P283E is the high-side fault of the fork C circuit. GM's 2023 summary checks the Corvette rod 3 sensor for two signs: no pulses at all with the pin above 3.5 V, and a duty cycle above 92 %. Either one, held for 150 ms with reference B in its 4.5 to 5.5 V window and the engine not cranking, stores a Type A code. Ford lists P283E for TR9070 rod sensor 3 as a pulse width beyond the upper limit, input stuck at one. Mercedes-Benz uses P283E00 on the 8G-DCT for a fork C sensor with a short to positive. In practice a pinched harness where the signal touches a feed, water in a connector bridging pins, or a sensor that has lost its ground are the usual finds. Fork C gears stay unavailable until the circuit is repaired.
- What you may notice
- Warning lamp and gearbox fault message
- Fork C gears locked out
- Jerky driving in the substitute program
- Likely causes
- LikelyPinched harness with the fork C signal touching a feed wire
- PossibleWater in the connector bridging signal and supply pins
- RareFork C sensor without ground connection
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €150 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.