Powertrain, generic (extended)

P2E34 Battery Charger A Module Forced Shutdown Voltage High

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P2E34 is set when the forced shutdown line of charger A reads above its permitted voltage. The usual cause is contact with a battery-fed or switched 12 V wire in the same harness, or an internal leak inside the charger or the commanding module. No manufacturer documents P2E34 publicly. The danger is the reverse of P2E33: on a fail-safe line such as the EmShut input of the EVCC by Watt & Well, where current flowing means normal operation, a line stuck high can no longer carry a stop request. A well-designed control unit therefore distrusts the charger and keeps it disabled instead of risking charging it cannot switch off. The CARB charger rule for plug-in hybrids applies. Low is P2E33, implausible P2E32, charger B high P2E40. Expect no charging through charger A.

Likely causes

Shutdown line shorted to a 12 V feed in the harness
Internal leakage in charger A or the commanding module
Incorrect wiring after a previous harness repair

Symptoms

  • Charger A disabled, plug-in charging not possible or slower
  • Charging system warning message

Repair estimate

DifficultyHardWorkshop job
Parts and labour€60–2,000
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

P2E32P2E33P2E40P2E2E

References: law.cornell.edu, wattandwell.com.