P0D21
Battery Charger A Output Voltage Too Low
Generic OBD-II
Common symptoms
What you'll notice
- Check the battery voltage and ensure it is within the normal range.
- Inspect the battery terminals and cables for any signs of corrosion or loose connections
- Check the battery charger itself for any malfunctions and consider replacing it if necessary.
Common causes
Most likely first
- Faulty battery charger
- Insufficient power supply to the battery charger
- Loose or corroded battery terminals
- Faulty charging cables or connectors
- Defective charging circuit in the vehicle
How to diagnose & fix
Work through it in order
- Diminished power or acceleration
Read & clear P0D21 yourself
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