OBD-II FAULT CODE
B2545
System Power Relay Circuit Short to Battery
Meaning, symptoms, likely causes, diagnostic checks and repair guidance for B2545.
- Body/accessory warning lamp or feature not working
- Weak battery
- Charging system fault
- Loose/corroded terminals
- Poor ground
- Wire shorted to power feed
- Check related fuses, connectors, grounds and switch/module power supply
- Test battery state of charge and charging voltage
- Inspect terminals and ground straps
- Check for unwanted voltage on signal/control circuit
- Clean/tighten terminals, replace weak battery, repair alternator/charging circuit as needed
- Repair harness short to power or replace internally shorted component
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Disclaimer: Information is provided for general guidance only and may not apply to all vehicles. Always consult a qualified technician.