Charging System Voltage

Check these first

• Weak or failing battery
• Worn alternator belt or slipping drive
• Failed alternator or voltage regulator
• Corroded battery terminals or ground straps

What to do next

1. Measure battery voltage at rest and while cranking
2. Check charging voltage at idle and at 2000 rpm
3. Inspect the alternator belt and tensioner
4. Clean and tighten the battery terminals and grounds
5. Test the alternator output under load
6. Clear the code and retest

Look up another code