P2E4CBattery Charger Coupler Temperature Sensor C Circuit Low
- Generic OBD-II code · Powertrain
- How the car detects it
- P2E4C says the voltage on the sensor C input has fallen under its lower limit. Low is about the signal; the temperature it implies depends on the element. Volex fits its NACS inlet with NTC thermistors of 100 kΩ at 25 °C and a B value of 4150 K, whose resistance shrinks as they warm, so with a pull-up a very low voltage stands for an absurdly hot contact. Amphenol's NACS inlet watches DC+ and DC- with PT1000 elements instead; there the same low signal reads as implausibly cold. A short to ground pulls the line down whatever the element, and so can water or corrosion bridging the sensor pins. No manufacturer documents P2E4C publicly, and no thresholds are published. Unlike a true overheat verdict (P2E4E), the circuit is suspect here. P2E4D is the high-signal counterpart.
- What you may notice
- Charging blocked at once or ended shortly after start
- Charging system warning
- Fault may follow rain or a car wash
- Likely causes
- LikelySensor C signal wire shorted to ground
- PossibleWater or corrosion bridging the sensor terminals in the inlet or its connector
- PossibleTemperature element C shorted internally
- 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.