P2472Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic (Bank 1 Sensor 4)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P2472 reports that the last bank 1 temperature probe (sensor 4) changes its signal too abruptly between two readings, although each reading on its own lies in range. GM documents it as a quick-change monitor with a 100 ms task: the 2017 and 2018 diesel tables look at the resistance step between consecutive samples (more than 10 Ω) and fail after 15 of 30 samples, the 2025 tables use a temperature step above 100 °C with 12 of 25 samples; all are Type B, so the MIL waits for a second trip. Stellantis case S2625000003 names it next to P2470 and P2471 for the 2025 and 2026 heavy-duty Ram pickups. Ford's diesel summaries do not use this number. Corroded pins, loose terminals and fatigued wires near the hot pipe cause most cases. A probe that is steady but wrong is P246F.
- What you may notice
- MIL on after the second faulty trip
- Temperature value flickers in live data
- Fault comes and goes, often after rough roads
- Likely causes
- LikelyLoose or corroded terminal in the probe connector
- PossibleWire fatigue near the hot exhaust pipe
- RareCracked sensing element giving unstable contact
- 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: €0 – €350
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.