P2E4ABattery Charger Coupler Temperature Sensor C Circuit
- Generic OBD-II code · Powertrain
- How the car detects it
- P2E4A is the general electrical fault of a third temperature measuring point in the charging inlet, logged when the module sees a defective circuit but does not sort it into low, high or implausible. Unlike sensors A and B, the C row has no intermittent code of its own. Why a third sensor exists: a TE Connectivity patent (US11329436) recalls that above 200 A each DC contact needs its own permanent temperature watch, and inlets such as Sailtran's CCS2 add one at the L1 pin. Which contact C watches is up to the maker, and none documents P2E4A publicly. A Phoenix Contact patent (US10256579) shows that one sensor input may even be a series chain of PTC elements on several pins, so one broken lead silences the whole chain. CARB expects charger faults that block or slow plug-in hybrid charging to be detected.
- What you may notice
- Charging refused or only possible at reduced power
- Charging system warning in the cluster or the app
- Charge indicator at the inlet signals a fault
- Likely causes
- LikelySensor lead or crimp between inlet and evaluating module broken
- PossibleLow-voltage connector of the inlet harness loose or corroded
- PossibleTemperature element C (or one element of a PTC chain) failed inside the inlet
- RareMeasuring input in the charger or charge control module defective
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.