P283BShift Fork C Position Circuit
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P283B is the generic circuit code for the shift fork C position sensor. The only public manufacturer listing that uses it comes from Mercedes-Benz: on the 8G-DCT dual-clutch transmission (724.1) P283B00 stands for an electrical fault of the fork C sensor and belongs to the codes covered by its XENTRY repair routine for this gearbox. GM's Corvette software, in which fork C is rod 3 on the even-gear shaft, and Ford's TR9070, which calls it rod position sensor 3, do not set P283B and break circuit faults down into P283D, P283E and P283F instead. Ford's 2012 DPS6 has just two shift drums and no fork C code. Once the reading is lost, the gears this fork engages are normally dropped and the transmission continues in a fallback mode.
- What you may notice
- Transmission warning in the instrument cluster
- Gears handled by fork C no longer engaged
- Emergency mode with reduced performance
- Likely causes
- LikelyFork C position sensor with an internal electrical fault
- PossiblePoor contact or moisture at the sensor or TCM connector
- RareDamaged sensor input in the transmission control module
- 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: €200 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.