P2843Shift Fork D 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
- P2843 means the fork D position line is sitting near supply level. GM's 2023 Corvette table raises it for rod 4 when there is no pulse activity and more than 3.5 V on the pin, or when the duty cycle is above 92 %; after a 150 ms confirmation a Type A code is set. The monitor is held off while P0652 or P0653 report a reference B problem and whenever battery voltage leaves the 8.75 to 18 V band, which keeps low-voltage starts from producing false entries. Ford's TR9070 counterpart is a rod sensor 4 signal held at logic one with too long a pulse, and in Mercedes-Benz's 8G-DCT list P284300 describes a positive short of the fork D sensor. A signal wire in contact with a feed or an open sensor ground is the likely cause.
- What you may notice
- Fault message and warning lamp
- Some even gears no longer selected
- Limp-home operation
- Likely causes
- LikelyFork D signal wire in contact with a feed wire
- PossibleOpen ground circuit of the fork D sensor
- RareInternal short in the sensor pulling its output high
- 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.