P2E3A code meaning
Battery Charger B Output Voltage Performance
What P2E3A means
P2E3A says the high-voltage output of charger B does not follow its target, typically in the constant-voltage phase near the end of a charge, without being clearly too low. No manufacturer documents P2E3A publicly. The A-side code P0D20 shows two readings of the same check. GM's 2011 Volt sets it in constant-voltage mode once the output deviates by 15 % or more, 30 times in 50 samples at 100 ms, One Trip Type A. Ford's 2019 plug-in hybrid summary files P0D20 when the charger, connected and fed with AC, delivers less output power than expected. Holley's 30-8405 unit specifies an output voltage accuracy of 1 %. CARB covers faults that keep the battery from filling completely. Clearly low output is P2E3B, current deviation P2E3C. Charging may end early or below full.
P2E3A at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyWorkshop only
- Typical labor0.5 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2E3A
- Battery does not reach full charge
- Charging stops early or takes longer
- Charging system warning message
Common causes of P2E3A
- Most likelyDegraded power stage or regulation inside charger B
- PossibleDrifting output voltage measurement
- PossibleCharger or battery module software needing an update
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
On board chargerWiring harness
What each part of P2E3A means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 3A | The exact fault in that area. |
What to do next
- Note P2E3A 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 P2E3A
What does P2E3A mean?
P2E3A means "Battery Charger B Output Voltage Performance". P2E3A says the high-voltage output of charger B does not follow its target, typically in the constant-voltage phase near the end of a charge, without being clearly too low. It is a generic code, so it means the same on every make.
Is it safe to drive with P2E3A?
P2E3A does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will P2E3A fail an emissions test?
P2E3A 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 P2E3A to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 4 hours of work. This is a job for a workshop.
Will P2E3A clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.