P2802Transmission Range Sensor B 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
- P2802 means the B signal of the range sensor sits too low, usually a ground short or a duty cycle collapsing toward zero. GM's tables for 2020 and 2025 place the check in the engine module, which reads internal range sensor B on its own wire: a circuit impedance under 0.5 ohm to ground for 0.5 s within a one-second window sets the code as Type A, MIL in the first trip. Ford's 2024 summary sets it (P2800_84) on its six- and ten-speed automatics when the duty cycle drops below 8 %. Ford's hybrid sedans and the C-Max showed P2802 alongside P2800 once water had entered connectors (SSM 47790). P2803 is the high fault and P0707 the matching low fault of sensor A.
- What you may notice
- MIL or wrench lamp on
- No start in Park, missing gear indication
- Stop-start or shift functions restricted
- Likely causes
- LikelySignal wire of sensor B shorted to ground
- PossibleWater or corrosion in a connector of the circuit
- PossibleRange sensor output stage failed low
- 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.