P2471Exhaust Gas Temperature Sensor Circuit High (Bank 1 Sensor 4)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P2471 is set when the fourth bank 1 exhaust temperature probe drives its input above the upper limit, the picture of an open circuit, an unplugged sensor or a short to voltage. Ford's diesels call more than 2.66 V a fault. GM checks both a short to power and an open driver circuit: above 900 Ω in the 2017 and 2020 tables, above 1,400 Ω in 2018, with 10 failed readings in 20; the 2020 and 2025 tables rate it Type A, so the MIL can come on in the first trip, and 2025 uses more than 100 MΩ or a digital reading above about 1,290 °C. Ram includes P2471 in case S2625000003 for 2025–2026 Ram 2500/3500 and points technicians to sensor names rather than numbers when locating the part. Start with the connector and a cold resistance check. Too low is P2470.
- What you may notice
- MIL on, on GM possibly in the first trip
- Last exhaust probe shows maximum or substitute value
- Regeneration or DEF dosing inhibited
- Likely causes
- LikelyConnector unplugged or wire broken (open circuit)
- PossibleSensing element burnt out
- RareSignal line shorted to a voltage source
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €20 – €350
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.