P2834Shift Fork A 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
- P2834 is the high-side counterpart: the fork A position input sits at the upper limit. In GM's 2023 Corvette table the rod 1 sensor is flagged when pulses stop and the pin voltage stays above 3.5 V, or when the duty cycle climbs over 92 %; after 150 ms a Type A fault is stored, but only while the sensor supply lies between 4.5 and 5.5 V and the battery between 8.75 and 18 V. Ford's 2024 summary for the TR9070 describes the same condition as pulse width above its window, input stuck at one. On the Mercedes-Benz 8G-DCT the code means the fork A sensor circuit has shorted to positive. A signal wire touching the sensor supply or a sensor whose output transistor no longer switches are the usual explanations.
- What you may notice
- Warning lamp with stored code
- Shifts on the affected shaft blocked
- Reduced driveability in limp-home mode
- Likely causes
- LikelySignal wire shorted to the 5 V sensor supply or battery voltage
- PossibleSensor output transistor no longer pulling low
- RareLost sensor ground
- 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.