P2800Transmission Range Sensor B Circuit (PRNDL Input)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2800 is the general circuit code for the second signal path that tells the modules which selector position (P, R, N, D, L) is engaged. It applies when that signal is unusable without a clear low, high or frequency pattern. Ford's 2019 hybrid OBD summary lists it for the eCVT range sensor with the wrench lamp and no MIL, judged in under a second; one section also sets it when the gear position message from the engine module over CAN is invalid. Ford's 2024 summary uses P2800 as the base number for its TRS B sub-faults. Ford message SSM 47790 ranks P2800 among the most frequent codes on Fusion, MKZ and C-Max hybrids built 2013-2019, caused by water or corrosion in several connectors. Sensor A has P0705.
- What you may notice
- Wrench lamp or MIL on, gear display missing or wrong
- Engine does not start in Park or Neutral
- Trouble selecting a drive position
- Likely causes
- LikelyWater entry or corrosion in connectors along the sensor circuit
- PossibleChafed or broken wiring between sensor and module
- PossibleFailed transmission range sensor
- RareInvalid gear position message from another module over CAN
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €60 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.