Powertrain, generic (extended)

P2E3A Battery Charger B Output Voltage Performance

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

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.

Likely causes

Degraded power stage or regulation inside charger B
Drifting output voltage measurement
Charger or battery module software needing an update

Symptoms

  • Battery does not reach full charge
  • Charging stops early or takes longer
  • Charging system warning message

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€0–2,500
Time0.5–4 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

on board chargerwiring harness

Related codes

P2E3BP2E3CP0D20P0D85

References: law.cornell.edu, gsi.ext.gm.com, fordservicecontent.com, documents.holley.com.