B1318 Battery Voltage Low
What does B1318 mean on a Ford?
B1318 — Battery Voltage Low. This Ford-enhanced code applies to Focus, Escape, F-150 — reported by ABS, cluster and restraint modules.
Common causes of B1318
- Discharged or failing battery
- Failing alternator undercharging
- Corroded battery terminals
- Parasitic drain
- Module sense fault
How to fix B1318
- Load-test the battery
- Verify charging voltage above 13V running
- Clean terminals and grounds
- Test for parasitic drain if the battery keeps dying
- Clear the code once voltage stays above 9V in all states