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DTC codes / P2Exx · Hybrid propulsion / P2E3C

P2E3CBattery Charger B Output Current Performance

P2E3C indicates that the powertrain control module (PCM) has detected an abnormal output current from the battery charger circuit labeled 'B'. The PCM monitors the charger's output and sets this code when the current is outside the expected range for the given operating conditions, which can be caused by a faulty charger, wiring issues, or a failing battery.

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

Symptoms you may notice

  • Illumination of the check engine light or service vehicle soon message
  • Often no symptoms besides the warning light
  • Battery may not charge properly, leading to hard starting or electrical accessory issues
  • Possible reduced engine performance or electrical system voltage fluctuations
  • In some cases, the vehicle may enter a reduced power mode or fail to start

Common causes, most likely first

  1. Faulty battery charger module or internal failure
  2. Damaged or corroded wiring and connectors in the charger output circuit
  3. Poor ground connection for the charger or battery
  4. Failed current sensor or voltage sensing circuit
  5. PCM software issue or internal fault
  6. Aging or failing battery that cannot accept charge properly

How to diagnose and fix it

  1. Inspect the battery charger wiring and connectors for damage, corrosion, or loose pins
  2. Test the battery condition and state of charge using a conductance tester
  3. Check the charger output current with a clamp meter and compare to specifications
  4. Verify the charger's ground connection and clean any corrosion
  5. Inspect the current sensor and its wiring, and test its signal if accessible
  6. Reprogram or update the PCM if a known software issue exists
  7. Replace the battery charger module if all other checks pass and the fault persists

What Most Techs Overlook on P2E3C

  • A weak or aged battery can cause the charger to operate outside its expected current range, setting this code even when the charger itself is healthy.
  • Corroded ground connections at the charger or battery are a frequent cause that is often missed during visual inspections.
  • The code can be set by a momentary glitch in the current sensing circuit, so always check for related history codes and freeze-frame data before replacing parts.
  • On some vehicles, the battery charger is part of a module that also controls other functions, so a failure may cause additional unrelated symptoms.
  • After repairs, the PCM may require a relearn procedure or a drive cycle to clear the code and verify the fix.

Can I keep driving with P2E3C?

You can usually drive the vehicle with this code, but avoid long trips or heavy electrical loads until it is diagnosed, as a charging system fault could leave you stranded with a dead battery.

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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