P2EA5Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 6
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2EA5 is the plausibility fault of the sixth bank 1 exhaust probe: the voltage is electrically valid, yet the temperature does not match what the exhaust is doing. California's rule 13 CCR 1968.2, section (e)(15.2.1), like §1971.1 for heavy-duty engines, asks for two-sided rationality checks and names exhaust temperature sensors that steer a catalyst temperature strategy. No manufacturer publishes P2EA5. GM's 2025 diesel check for probe 5 (P2483) shows the method: after more than 10,800 s engine off, the value frozen at key-on is the reference, and if the probe then rises less than a calibrated map expects, it is judged stuck or out of the gas stream. Typical causes are a probe pulled from its boss, soot-coated or drifting elements, or two probes swapped at their plugs.
- What you may notice
- Check engine lamp after two trips
- Probe 6 stays flat or lags while other probes heat up
- Regeneration interrupted or not started
- Likely causes
- LikelyProbe loose or pulled from its boss after exhaust work
- PossibleDrifting element or soot-coated tip reacting too slowly
- PossibleNeighbouring probes swapped at their connectors
- RareContact resistance in the connector shifting the reading
- 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: €80 – €500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.