What It Means
B0002 indicates a fault in the driver’s frontal airbag deployment control circuit (Stage 1), where the module has detected a “low” signal. This suggests abnormal voltage in the circuit, which can be caused by shorted wiring, high resistance, or a failing component. Like B0001, this fault relates directly to the Supplemental Restraint System (SRS).
Source: OBD-Codes.com – B0002
Symptoms
- Airbag warning light illuminated on the dashboard
- Airbag system disabled or partially disabled
- No direct drivability issues
Severity / Priority Level
High. This is a major safety concern. A faulty deployment circuit means the driver’s airbag may not function correctly in the event of a collision. Immediate repair is necessary.
Common Causes
- Short-to-ground condition in the airbag wiring harness
- Faulty driver airbag module
- Damaged or defective clock spring
- Corroded or loose wiring/connector pins
- SRS control module fault
Sources:
Possible Fixes
- Scan with an advanced diagnostic tool and monitor live data from the SRS module
- Inspect the wiring harness for short circuits, corrosion, or damaged insulation
- Test continuity and resistance levels of the driver’s airbag circuit
- Replace clock spring if tests confirm fault in steering column wiring
- Replace driver airbag module if necessary
- Replace or reprogram the SRS control module if no other causes are found
- Clear codes and verify operation