What does B1318 mean on a Ford?

B1318. Battery Voltage Low. Applies to Focus, Escape, F-150. Reported by ABS, cluster and restraint modules.

What causes B1318 on a Ford?

Discharged or failing battery Failing alternator undercharging Corroded battery terminals Parasitic drain Module sense fault

How do I fix B1318 on a Ford?

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

Code

B1318

Battery Voltage Low

Category: Body
Severity: Body Warning Light
Applies to: Focus, Escape, F-150. Reported by ABS, cluster and restraint modules
Related: No single generic twin. See OBD Codes List

Findings, check these first

Discharged or failing battery
Failing alternator undercharging
Corroded battery terminals
Parasitic drain
Module sense fault

Standard procedure

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

Code lookup

Type a code above, or start from a symptom or a common code.

Press / to jump to the box. Ford-enhanced powertrain, body, chassis and network codes. Generic P0xxx codes live on OBD Codes List.

Sources and review

Review: checked against the recorded source material.

OBDII.pro: B1318 Ford definition
live reference page (obdii.pro)
Supports: Ford-family meaning for B1318: BATTERY VOLTAGE LOW
Fetched directly. obdii.pro is a publisher independent of the engine-codes family.
B1318 FORD Code: Meaning, Causes, and Symptoms | OBD2 Codes
live reference page (obd2-codes.co)
Supports: Ford meaning for B1318: Battery Voltage Low
Fetched directly. obd2-codes.co phrasing matches the engine-codes family, so it counts as one publisher.

Last updated 2026-09-25.

Report a correction for B1318. Include your vehicle, the issue and a source if you have one.