Diagnostic system

Airbag, Restraint and Body Trouble Codes

Understand deployment-loop, impact-sensor, seat-belt and restraint-module faults while respecting the special safety rules for SRS systems.

1 published guidesNew guides added daily
Airbag and Body Codes diagnostic illustration

Restraint systems need trained handling

An illuminated airbag warning lamp can mean part or all of the supplemental restraint system is unavailable. Airbag modules and pretensioners contain pyrotechnic devices and can cause injury if tested or handled incorrectly.

Confirm the vehicle-specific definition

Many B-codes depend on manufacturer terminology and symptom bytes. Do not probe deployment circuits with an ordinary test light or ohmmeter unless the official procedure explicitly permits it.