P0E5E: Battery Charger Control Module Processor Performance

What it means

The control module detects that the battery charger control module processor is not performing within its expected parameters. The code alone does not identify a particular processor, memory, or software failure.

At a glance

• Usually lights the check-engine light
• The engine or gearbox may go into limp mode

How it works

The battery charger control module manages charging and uses its processor to carry out its control tasks. This code means the monitored processor performance is outside the expected range; the code alone does not identify whether the cause is the module, its power or ground supply, or its software calibration.

Common causes

Most likely first.

1. Battery charger control module fault
2. Power supply or ground fault to the module
3. Module software or calibration fault

Symptoms

• Charge status indicator shows fault
• Charging may not start or interrupts
• Slower-than-expected charge rate

How to diagnose it

1. Save freeze-frame data and note whether the fault occurs at charging startup, during charging, or at a particular charge rate.
2. Scan for related charger, power-supply, and communication codes that may point to a shared cause.
3. Inspect the battery charger control module’s accessible connectors and wiring for damage, corrosion, or loose connections.
4. Check the module’s power and ground circuits under the conditions specified by the manufacturer.
5. If the supply and connections are sound, check for applicable software or calibration updates and evaluate the module according to manufacturer procedures.

Common fixes

• Repair a loose, damaged, or corroded module connector.
• Repair faulty power or ground wiring to the charger control module.
• Apply an applicable manufacturer software or calibration update.
• Replace the battery charger control module if testing confirms an internal fault.

Can I keep driving?

If charging fails or repeatedly stops, do not count on the vehicle reaching its intended electric range; arrange another way to charge before a longer trip. Follow any hybrid/EV system warnings and stop if the vehicle reports a safety fault.