P0E65: Battery Charger Control Circuit/Open

What it means

The control module detects an open or interrupted battery charger control circuit. The effect on charging depends on the vehicle.

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 circuit carries the module’s control signal to the charger. P0E65 sets when that circuit is open or interrupted, so the charger may not receive the command needed to operate and charging can fail or stop.

Common causes

Most likely first.

1. Open in control wire
2. Connector open
3. Pin pushed back out of connector body

Symptoms

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

How to diagnose it

1. Use a scan tool to record freeze-frame data and check whether the charger control command is present during a charging attempt.
2. With the vehicle safely powered down, inspect the control-circuit connector for a loose fit, separation, corrosion, or visible damage.
3. Check for a pushed-back pin or a terminal that has lost contact inside the connector body.
4. Following the vehicle’s service procedure, test continuity through the control wire and check for an open between the module and charger.
5. If the wire and connectors pass, test the module and charger control terminals using the manufacturer’s diagnostic procedure.

Common fixes

• Reconnect and secure an open or loose control-circuit connector.
• Repair or replace a pushed-back or damaged terminal.
• Repair a broken or open control wire.
• Replace a failed module or charger control component only after testing confirms the fault.

Can I keep driving?

Charging may not start or may be interrupted, so do not assume the vehicle will have its expected electric range. If a high-voltage warning or reduced power appears, follow the vehicle’s safety guidance and avoid driving until the condition is assessed.