Powertrain, generic (extended)

P2EA8 DC/AC Converter A Input Voltage Too High

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P2EA8 is the reverse of P2EA7: the DC input of converter A lies above its permitted window. In the 12 V design of Toyota Industries' patent US10050558 the inverter stops once the battery side exceeds about 16 V, for example after a jump start from a 24 V source or with a failed alternator regulator. Unlike the low-voltage case it does not simply resume, but waits for a reset such as switching the vehicle off and on or unplugging the loads. Where the converter hangs on the high-voltage bus, as in Ford's Pro Power layout (US11043801), an overvoltage points to the traction system rather than to the converter. No manufacturer documents P2EA8 publicly. The sockets switch off to protect the unit and the connected devices.

Likely causes

Charging system overvoltage from a faulty alternator regulator or DC/DC converter
Jump start or charging with too high a voltage
Faulty input voltage measurement inside the converter

Symptoms

  • AC sockets switch off and stay off until a restart
  • Other overvoltage messages or flickering lights

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€0–700
Time0.5–2.5 h

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

Parts involved

dc ac converter module aalternatorwiring harness

Related codes

P2EA7P2EA9P0563U0288

References: patents.google.com, patents.google.com.