P0D20
Battery Charger A Output Voltage Performance
Generic OBD-II
Common symptoms
What you'll notice
- Check and clean battery terminals
- Check and replace faulty battery charger
- Inspect and repair wiring connections
- Replace battery
Common causes
Most likely first
- Faulty battery charger or charging system
- Insufficient voltage supply from the battery charger
- Overcharging of the battery
- Poor connection or faulty wiring in the charger or charging system
- Defective voltage regulator in the battery charger
How to diagnose & fix
Work through it in order
- Diminished power or sluggish acceleration
- Warning light illuminated on the dashboard
Read & clear P0D20 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.