OBD-II FAULT CODE
B2490
UNDERHOOD LAMP OUTPUT CIRCUIT Short to Battery
Meaning, symptoms, likely causes, diagnostic checks and repair guidance for B2490.
- Body/accessory warning lamp or feature not working
- Blown bulb/LED module
- Poor ground
- Fuse/relay fault
- Switch/module/wiring issue
- Wire shorted to power feed
- Check related fuses, connectors, grounds and switch/module power supply
- Check bulb/module, fuse, ground and connector corrosion
- Check for unwanted voltage on signal/control circuit
- Replace failed bulb/module, repair ground/wiring, replace switch/relay if confirmed
- Repair harness short to power or replace internally shorted component
Related Codes
Need more help?
Search manuals, wiring diagrams and technical service bulletins.
Not sure what to do next?
Get step-by-step instructions and professional repair information.
Disclaimer: Information is provided for general guidance only and may not apply to all vehicles. Always consult a qualified technician.