P0E66
Battery Charger Control Circuit Low
Generic OBD-II
Common symptoms
What you'll notice
- Inspect the battery charger control circuit for any damaged or loose connections.
- Test the voltage output of the battery charger control circuit to ensure it is within the proper range.
- Replace the battery charger control circuit if all other troubleshooting steps fail to resolve the issue.
Common causes
Most likely first
- Faulty battery charger control circuit
- Loose or corroded wiring connections in the battery charger control circuit
- Malfunctioning battery charger control module
- Defective battery charger itself
How to diagnose & fix
Work through it in order
- Battery may not charge properly
- Warning light may illuminate on the dashboard
Read & clear P0E66 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.