B0005 is a body chassis code indicating a malfunction in the collapsible steering column deployment control circuit within the supplemental restraint system (SRS). This code is stored when the airbag control module detects an open, short, or implausible signal in the circuit that controls the steering column's ability to collapse during a crash. The code does not necessarily indicate the system has deployed, but rather that there is an electrical fault preventing proper operation.
The collapsible steering column mechanism has an integral position sensor and deployment circuit that can fail due to wear, corrosion, or mechanical damage over time.
The wiring between the steering column and airbag control module can chafe, corrode, or become damaged from steering movement, moisture intrusion, or previous repair work.
The sensor that monitors steering column position and lock status may provide erratic or open circuit readings to the control module.
The clock spring (spiral cable) in the steering column can develop opens or high resistance that affects multiple SRS circuits including column deployment control.
Connectors at the steering column or airbag control module may have poor electrical contact from corrosion, pushed-out pins, or harness tension.
The SRS control unit itself can fail, though this is relatively rare compared to external circuit faults - it should be diagnosed only after all other causes are ruled out.
The definition is universal; the diagnostics are engine-specific. Open your vehicle for the codes documented for it:
Driving is possible but not recommended. The collapsible steering column is a safety-critical system, and its malfunction could affect crash protection. The airbag warning light indicates the SRS may not deploy correctly in an accident.
Not necessarily. A B0005 code indicates a fault in the deployment control circuit, which could mean the system would either fail to deploy properly or deploy unexpectedly. The code does not mean deployment has already occurred.
While sometimes suggested, the airbag (SRS) control module is rarely the actual cause of B0005. Most cases are resolved by repairing wiring, connectors, the steering column sensor, or the clock spring. Control module replacement should be considered only after exhaustive diagnosis of all external circuits.
Clearing the code with an OBD-II scanner may temporarily turn off the light, but the fault will typically return once the system retests. The underlying electrical issue must be diagnosed and repaired for a permanent fix.