Body
Manufacturer-specific
OBD-II Fault Code
B1317: Battery Voltage High
Meaning, symptoms, likely causes, diagnostic checks and repair guidance for B1317.
Power supply / charging
Use this category to narrow your checks before replacing parts.
High
Severity is a general guide. Confirm with scan-tool data and vehicle symptoms.
What B1317 usually means
Battery Voltage High.
Common symptoms
Body/accessory warning lamp or feature not working
Likely causes
Weak battery; Charging system fault; Loose/corroded terminals; Poor ground; High signal voltage; Open ground; Short to voltage; Failed sensor
Diagnostic checks
Check related fuses, connectors, grounds and switch/module power supply; Test battery state of charge and charging voltage; Inspect terminals and ground straps; Check sensor ground and signal circuit for short to voltage
Repair guidance
Clean/tighten terminals, replace weak battery, repair alternator/charging circuit as needed; Repair ground/signal circuit or replace confirmed faulty sensor
Verification after repair
Operate the affected body/accessory system and rescan