P2E4DBattery Charger Coupler Temperature Sensor C Circuit High
- Generic OBD-II code · Powertrain
- How the car detects it
- P2E4D is stored when the sensor C input rises above its upper limit. In a pull-up circuit that is the signature of an open loop, an unplugged connector or a short to a supply voltage. Read as temperature, it means very cold for an NTC, but very hot for a PT1000 or a PTC element. The Phoenix Contact patent US10256579 describes PTC elements wired in series on several contacts whose resistance climbs steeply once a set temperature is passed; seen from the module, a broken chain looks the same as a tripped one. Charge controllers such as Watt&Well's EVCC accept either PT1000 inputs, measured in a Wheatstone bridge, or NTC inputs on bias resistors, so what high means depends on how the input is configured. No manufacturer documents P2E4D publicly or gives limits. P2E4C is the low-signal sibling; P2E4E is real overheating.
- What you may notice
- Charging does not start or stops immediately
- Charging system warning
- Displayed inlet temperature stuck at an extreme value
- Likely causes
- LikelySensor C loop open, for example a broken wire or unplugged connector
- PossibleSignal wire shorted to a supply voltage
- PossibleTemperature element C or one link of a PTC chain open inside the inlet
- RareMeasuring input of the evaluating 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.