What it means
The control module detects that the battery charger control circuit is operating outside its expected range or performance. The effect on charging depends on the vehicle.
At a glance
- Usually lights the check-engine light
How it works
The battery charger control circuit conveys a control signal that the module checks for expected behavior. P0E68 sets when that signal’s range or performance is implausible, which can cause a charger-status fault or unreliable charging even when the circuit is not simply open or consistently high or low.
Common causes
Most likely first.
- Indicator lamp aged
- High-resistance contact
- Sensor element aged beyond calibration window
Symptoms
- Charge status indicator shows fault
- Charging may not start or interrupts
- Slower-than-expected charge rate
How to diagnose it
- Use a scan tool to save freeze-frame data and compare the charger control command and feedback during a charging attempt.
- With the vehicle safely powered down, inspect the charger control connector for loose fit, corrosion, or damaged terminals.
- Check the control-circuit wiring for high-resistance contacts and signs of intermittent connection.
- Following the service procedure, measure the control signal and circuit continuity against the manufacturer’s specification.
- If the circuit checks out, test the relevant control or indicator component for operation outside its calibrated range.
Common fixes
- Reseat and secure the charger control connector.
- Clean or repair high-resistance connector contacts.
- Repair damaged or intermittent control-circuit wiring.
- Replace a control or indicator component only if testing confirms it is outside specification.
Can I keep driving?
Charging can be slower or inconsistent, so check the charge status and available range before setting out. If a warning is accompanied by reduced power or other high-voltage alerts, follow the vehicle’s safety guidance.
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.