P2E4C code meaning
Battery Charger Coupler Temperature Sensor C Circuit Low
What P2E4C means
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.
P2E4C at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2E4C
- Charging blocked at once or ended shortly after start
- Charging system warning
- Fault may follow rain or a car wash
Common causes of P2E4C
- Most 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
- Less likelyMeasuring input of the evaluating module defective
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Charge port temperature sensorWiring harnessOn board charger
What each part of P2E4C means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 4C | The exact fault in that area. |
What to do next
- Note P2E4C and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2E4C
What does P2E4C mean?
P2E4C means "Battery Charger Coupler Temperature Sensor C Circuit Low". P2E4C says the voltage on the sensor C input has fallen under its lower limit. It is a generic code, so it means the same on every make.
Is it safe to drive with P2E4C?
P2E4C does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will P2E4C fail an emissions test?
P2E4C is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is P2E4C to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P2E4C clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.