P2EA3Exhaust Gas Temperature Sensor Circuit Low Bank 1 Sensor 6
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- With P2EA3 the input of the sixth bank 1 exhaust probe drops below the lowest value a healthy circuit can deliver. Electrically this is nearly always a short: the signal wire touching ground or the exhaust, or an element whose insulation has broken down. What the module displays differs by type, as Hella explains for divider circuits: a shorted NTC probe looks red hot, a shorted platinum (PTC) probe looks frozen. No manufacturer documents P2EA3; GM's code P2481 for probe 5 serves as a guide, set below 1 Ω or, with a digital thermocouple, colder than about −73 °C in 19 of 25 samples as Type B, i.e. MIL after two trips. A wrong low value can mislead the module about exhaust heat, so regeneration or SCR dosing may be held back.
- What you may notice
- Check engine lamp after the second faulty trip
- Probe 6 reads far too hot or far too cold depending on type
- Regeneration or SCR dosing held back
- Likely causes
- LikelySignal wire chafed through to ground or to the exhaust pipe
- PossibleProbe with internal short after thermal or mechanical damage
- PossibleWater or road salt bridging the connector pins
- 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: €100 – €550
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.