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DTC codes / P2Exx · Hybrid propulsion / P2E2C

P2E2CBattery Charger A Module Supply Voltage Performance

P2E2C indicates that the powertrain control module (PCM) has detected an abnormal supply voltage condition within the battery charger A module circuit, which is part of the high-voltage charging system on electrified vehicles. The PCM monitors the voltage feed to the charger module and sets this code when the voltage falls outside the expected range for a calibrated period, signaling a fault in the power supply to that module.

SystemPowertrain
Code typeGeneric (all makes)
SeverityMedium
Fix difficultyProfessional
AreaHybrid propulsion

Symptoms you may notice

  • Illumination of the check engine light or service vehicle soon message
  • Often no symptoms besides the warning light, especially if the fault is intermittent
  • Reduced or disabled high-voltage charging, leading to longer charge times or inability to charge
  • The vehicle may enter a reduced power mode or fail to start if the high-voltage battery is depleted
  • A warning message on the dash indicating a charging system fault or high-voltage system issue

Common causes, most likely first

  1. Corroded, loose, or damaged wiring or connectors in the battery charger A module supply circuit
  2. Blown fuse or faulty relay that supplies power to the charger module
  3. Internal failure of the battery charger A module causing excessive current draw or voltage drop
  4. Poor ground connection for the charger module or its associated components
  5. Faulty voltage supply from the power distribution module or wiring harness
  6. Software glitch in the PCM or charger control module requiring recalibration

How to diagnose and fix it

  1. Perform a visual inspection of the battery charger A module harness and connectors for damage, corrosion, or looseness
  2. Check all fuses and relays related to the charger module supply circuit and replace any that are faulty
  3. Measure the supply voltage at the charger module connector with a multimeter and compare to specifications
  4. Perform a voltage drop test on the power and ground circuits to identify excessive resistance
  5. Inspect and clean ground connections, tightening them to the manufacturer's torque specification
  6. If voltage supply is correct, test the charger module according to service information; replace if defective
  7. Reprogram or update the PCM and charger control module software if applicable

Charger supply faults often misdiagnosed

  • A common oversight is assuming the charger module itself is faulty when the real problem is a corroded connector or chafed wire in the supply circuit, so always perform voltage drop tests before replacement.
  • Intermittent codes can be caused by vibration or heat affecting a marginal connection, so wiggle-test the harness while monitoring live data to reproduce the fault.
  • This code does not always indicate a hard failure; a low 12-volt battery or charging system issue can cause the PCM to set false supply voltage codes for the high-voltage charger.
  • Some vehicles require a specific wake-up signal or enable line to be active for the charger module to receive full voltage, so check for missing activation signals before condemning the module.
  • After repairs, the code may require a drive cycle or a specific charging sequence to clear from history, so do not assume the fix failed if the light remains on immediately.

Can I keep driving with P2E2C?

You can generally drive the vehicle if the only symptom is the warning light, but avoid relying on high-voltage charging until the fault is repaired. If the vehicle shows reduced power or charging is completely disabled, limit driving to reach a safe location or service center.

Tools that help

Tools we recommend are in the Auto Veteran shop on Amazon. As an Amazon Associate we earn from qualifying purchases.

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.

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