P2E4BBattery Charger Coupler Temperature Sensor C Circuit Range/Performance
- Generic OBD-II code · Powertrain
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2E4B concerns a sensor C value that is electrically valid yet does not fit the situation, for instance a reading that ignores a heavy charge current, departs from the other inlet sensors or jumps without cause. CARB wants such rationality faults kept under their own code, apart from codes for wiring faults and values beyond the limits. TE Connectivity (US11117478) explains why inlet readings can be off: to keep the sensing circuit isolated, sensors often sit away from the power contact, so they lag behind it and read cooler. No manufacturer documents P2E4B. For the A sensor, GM's PIT5904 on the 2022 Hummer EV and BrightDrop EV600 suspects software or oversized, damaged terminals in heavily used station plugs, and says the test reruns only after about 10 minutes of driving above 2 mph. Hard circuit faults belong to P2E4A, P2E4C and P2E4D.
- What you may notice
- Charging stops or starts at reduced power, often at busy public stations
- Fault does not reappear until the car has been driven for a while
- Charging warning message
- Likely causes
- LikelyWorn or widened terminals in the charging station plug heating the contact unevenly
- PossibleSensor no longer in good thermal contact with its pin
- PossiblePlausibility logic in the charging software too strict, update available
- RareTemperature element drifted from its characteristic curve
- Repair
- Medium · Usually a job for a workshop.Typical cost: €0 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.