B0028
Right Side Airbag Deployment Control
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Code B0028 indicates a malfunction in the right (passenger) side airbag deployment control circuit. The right side airbag is designed to protect the front passenger during a lateral collision by deploying from the seat bolster or door panel and cushioning the impact between the occupant and the door. When this code is set, the airbag control module has detected a problem that could prevent this airbag from firing during a side impact.
The primary concern with this code is that passenger-side protection is compromised during side collisions, which are among the most dangerous types of crashes due to the limited crumple zone between the occupant and the point of impact. The airbag warning light will remain illuminated, and the entire SRS system may be partially disabled.
Professional diagnosis typically begins with reading sub-fault codes to determine whether the issue is an open circuit, short circuit, or resistance fault. The most common repair involves fixing damaged wiring in the door jamb transition area — the flexible boot where wires pass from the body into the door is a notorious failure point. If the airbag module itself has failed, the seat or door panel must be partially disassembled to access and replace it. This work should only be done by a trained technician with proper SRS safety procedures.
Severity
Symptoms
- •Airbag warning light illuminated on dashboard
- •SRS system fault message on instrument cluster or driver information center
- •Warning chime or tone at vehicle startup
- •No change in driving behavior — the risk is the passenger side airbag will not deploy in a side collision
Likely Causes
The right side airbag harness runs through the passenger door frame and into the seat bolster. Repeated door opening, moisture intrusion through worn door seals, or physical damage from items placed against the seat can cause wiring issues.
The side airbag module in the passenger seat bolster or door panel contains a squib that must maintain a specific resistance. Degradation over time or damage can cause an out-of-range reading.
The SRS controller monitoring the right side deployment loop may have an internal fault, or an intermittent power supply issue may prevent it from properly monitoring this circuit.
The satellite impact sensor in the passenger door or B-pillar provides crash severity data. A damaged or failed sensor can prevent proper deployment loop monitoring and trigger this code.
Estimated Cost
Professional Repair
Includes parts + labor
Common Fixes
- Inspect and repair wiring and connectors in the passenger door jam and seat area
- Replace the right side airbag module
- Replace the passenger side impact sensor
- Replace or reprogram the airbag control module