P2E4A code meaning
Battery Charger Coupler Temperature Sensor C Circuit
What P2E4A means
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.
P2E4A 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 P2E4A
- 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
Common causes of P2E4A
- Most 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
- Less likelyMeasuring input in the charger or charge control 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 P2E4A means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 4A | The exact fault in that area. |
What to do next
- Note P2E4A 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 P2E4A
What does P2E4A mean?
P2E4A means "Battery Charger Coupler Temperature Sensor C Circuit". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with P2E4A?
P2E4A does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will P2E4A fail an emissions test?
P2E4A 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 P2E4A to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P2E4A clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.