P2833Shift Fork A Position 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
- P2833 reports a fork A position signal stuck at the low end. On the Corvette dual-clutch gearbox the rod 1 sensor sends a pulse-width signal; GM's 2023 table sets the code when no pulses arrive and the pin stays under 2.0 V, or when the duty cycle drops below 8 %, each confirmed for 150 ms, with the 5 V sensor supply in range and rated Type A. Ford's 2024 summary calls the same case on the TR9070 a pulse width below its window, input stuck at zero. Mercedes-Benz uses P283300 when the fork A sensor circuit is shorted to ground in the 8G-DCT. Because a supply fault can mimic this pattern, GM blocks the test while supply codes such as P0642 are present. The gearbox then can no longer place the gears on that rod reliably.
- What you may notice
- Warning lamp and limp-home mode
- Gears of one shaft locked out
- Car may only pull away in a fallback gear
- Likely causes
- LikelySignal wire of the fork A sensor shorted to ground
- PossibleSensor output stage failed low
- RareOpen signal line letting the input float low
- 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.