DTC code
B2500
COURTESY LAMP OUTPUT Ckt Short to Battery
Technical guide
Symptoms
- Airbag warning light stays on constantly
- fails to illuminate during the initial bulb self-test at key-on
- or flashes a fault pattern
- SRS fault stored in the SRSCM.
Probable causes
- Burnt-out warning lamp bulb
- blown fuse
- open circuit in the warning lamp harness
- short circuit in the warning lamp harness
- broken clock spring
- damaged under-seat wiring
- faulty airbag control module (SRSCM) — sources note the module is often replaced by mistake before the lamp circuit is tested.
Diagnostic steps
- Confirm the vehicle make and the make-specific definition of B2500; on Hyundai/Kia proceed as an airbag warning lamp circuit fault.
- Read all SRS codes with a capable scanner and note whether B2500 is current or stored.
- Check the warning lamp bulb and the related fuse first — sources cite these as the most common and cheapest fixes.
- Inspect the warning lamp harness and connectors for opens, shorts, and damaged/corroded/bent pins; include clock spring and under-seat wiring in the inspection.
- Repair wiring or replace bulb/fuse/clock spring as found; only suspect the SRSCM after the lamp circuit tests good.
- Clear codes, cycle the ignition and verify the lamp performs its normal self-test then goes out. Note: sources mention a clock spring warranty extension on 2011-2016 Hyundai/Kia models — check before paying for repairs.
Cross-checked technical synthesis (QA). It does not replace the manufacturer's procedure.
Models most reported with this code (NHTSA)
Count of distinct owner complaints mentioning the code. US data — same engines, same failures.
AI here is a librarian: this page shows only what mechanics confirmed, or says “unknown”. It never suggests a diagnosis — MECCANIC interprets the code, never your car.
0 confirmed cases on B2500
Nothing confirmed yet for this code. No guess is offered on purpose.
Open a case