OBD
P0A73
Generator Phase V Current Low
What it means
P0A73 means Generator Phase V Current Low.
Check these first
- Low battery voltage
- A generator that is failing
- Corrosion or damage in the generator wiring
- A control module fault
What to do next
- Read generator phase V current on a scan tool
- Check battery voltage and charge if low
- Inspect the generator wiring and connections
- Test the generator output
- Replace the generator if phase V output stays low
- Clear the code and retest
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Updated
Generic SAE J2012 definition. Last updated 2026-10-10.