P0AFF
System Voltage Too Low for Voltage Step Down Conversion
Generic OBD-II
Common symptoms
What you'll notice
- Check the battery voltage and ensure it is within the recommended range.
- Inspect the alternator and make sure it is functioning properly.
- Check for any loose or corroded battery connections and clean/replace as necessary.
- Test the voltage regulator to determine if it is functioning correctly.
- Verify the condition of the voltage step down conversion system and repair or replace any faulty components.
Common causes
Most likely first
- Faulty alternator
- Weak or dead battery
- Loose or corroded battery connections
- Malfunctioning voltage regulator
Related codes
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