What it means
Battery charger B reports a fuse condition. HV charging operation may be impaired. The on-board charger negotiates voltage, current and safety with the EVSE; a fault interrupts charging or limits it to AC slow-charge despite a DC fast charger being attached.
At a glance
- Usually lights the check-engine light
- The engine or gearbox may go into limp mode
How it works
Charger B has a fuse-protection circuit that helps the control system identify a fuse fault affecting charger operation. P2E39 sets when the module reports that fuse condition, which may be caused by a blown charger fuse or an internal short; the code does not by itself identify which fuse or prove the cause.
Common causes
Most likely first.
- Charger main fuse blown
- Internal short circuit
Symptoms
- Charge status indicator shows fault
- Charging may not start or interrupts
- Slower-than-expected charge rate
How to diagnose it
- Read freeze-frame and charger B live data, then check for related charging-system codes that may help identify when the fuse condition was detected.
- With the vehicle made safe according to the manufacturer's procedure, inspect the identified charger B fuse and its holder for an open fuse, looseness, or heat damage.
- Check the charger B wiring and connectors for damage or evidence of a short before installing a replacement fuse.
- Test the charger B fuse circuit and look for an internal short using the manufacturer's diagnostic procedure.
- If the fuse circuit and harness are sound, follow the manufacturer's steps to determine whether charger B has an internal fault.
Common fixes
- Repair a loose or heat-damaged fuse-holder connection.
- Replace a confirmed blown charger B fuse after finding and correcting the cause.
- Repair wiring shorted in the charger B fuse circuit.
- Repair or replace charger B if testing confirms an internal short.
Can I keep driving?
Charger B may be unavailable, so charging can be interrupted or fail and your usable range may be limited. Do not repeatedly replace a blown fuse or handle high-voltage components; stop charging if the vehicle reports a high-voltage warning.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.