P2804Transmission Range Sensor B Circuit Intermittent
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2804 points to a B signal that drops out or jumps for short moments instead of failing permanently. Ford is the main user: its 2024 OBD summary books it as the general electrical fault of TRS B (UDS P2800_01), checked continuously, with up to 30 s allowed for pattern recognition and 2 s for analog faults. On 2020-2021 Transit vans, Ford's messages SSM 49242 and 49510 describe P2804 appearing with P2803, P0708, P0709, P0710 and P0713 and the MIL lit, and send technicians to four connectors to look for partial seating or pushed pins before any further diagnosis. The 2021 Bronco Sport bulletin 21-2331 lists it as well. Wiggle tests on the harness with the selector moved through all positions help to catch it.
- What you may notice
- MIL comes and goes, often with several transmission codes
- Gear display flickers
- Occasional shift system warning
- Likely causes
- LikelyConnector not fully seated or pin pushed back
- PossibleHarness chafing that opens the circuit under vibration
- RareWorn contacts or electronics inside the range sensor
- 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: €50 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.