B2500 - FAULT CODE - OBD2

POST UPDATED IN January, 2023

B2500 Code failures by brands

B2500 HYUNDAI, KIA: AIRBAG WARNING LAMP

Description of DTC code B2500

The airbag is a safety system that consists of a bag, which is inflated when the car may have a collision. Therefore, it reduces the damage to the occupants because the bag is interposed between them and some parts of the vehicle.

This system has a warning light located in the instrument cluster, which turns on, blinks, and turns off when the airbag system is working properly. Otherwise, it remains on. Once the switch or key is placed in the on position, the SRSCM (Supplemental Restraint System Control Module) performs a diagnostic of the overall airbag system. This controller measures the voltage of the external terminal of the lamp. It checks that the lamp is performing correctly according to the signal sent by the SRSCM.

The B2500 OBDII diagnostic code is stored on the Hyundai and Kia vehicles when an erratic operation of the Airbag warning lamp is detected.

Symptoms of fault code B2500

  • Check Engine Lamp ON.
  • The airbag warning lamp may be on permanently or not illuminate at all.

Causes of OBD2 B2500

The OBD2 fault code B2500 is set for one of the following reasons:

  • Airbag warning lamp circuit wires may be damaged.
  • Airbag warning lamp circuit electrical connections may be faulty, resulting in malfunction.
  • The airbag warning lamp may be burned out.
  • The Supplemental Restraints System Control Module may be damaged.

Possible solutions of the DTC code B2500

To troubleshoot the DTC B2500 OBDII code, try this:

  • Consult the Technical Service Bulletins.
  • Inspect the wiring and connections of the airbag warning lamp circuit. Check for common damage caused by burns or wear. Repair or replace any components with such conditions.
  • Measure the airbag warning lamp circuit voltages to rule out any shorts or open circuits. Fix if necessary.
  • Check the condition of the airbag failure warning lamp. If damage is found, consider replacing it.

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