OBD-II Code B0002 — What It Means & How to Fix It

What Does This Error Mean?

B0002 means there is a fault in the passenger's front airbag circuit. The computer has detected a problem with the wiring or hardware that controls the airbag on the passenger side of the dashboard. This is a safety-critical issue. The passenger airbag may not deploy in a crash. Get this inspected by a professional right away.

Affected Models

All vehicles 1996+ with dual airbag systems
Common in GM vehicles
Common in Chrysler/Dodge/Ram
Common in Ford vehicles
Most cars and light trucks made after 2000

Common Causes

Corroded or damaged wiring to the passenger airbag module under the dashboard
Faulty passenger airbag inflator module (the actual airbag hardware)
Defective airbag control module that manages all airbag circuits
Passenger seat occupancy sensor fault affecting airbag deployment logic
Poor electrical connector contact at the airbag wiring harness

How to Fix It

Do not attempt to access the passenger airbag or dashboard airbag components yourself. This is a job for a trained technician with the right tools. The risk of accidental deployment is real.

Even with the battery disconnected, airbag systems can hold a charge for several minutes.
Take your vehicle to a dealership or a shop with professional airbag diagnostic equipment. A standard code reader won't give the detailed information needed to pinpoint the exact fault.

Ask them to check for both circuit fault type — open circuit, short to ground, or short to power — as this helps identify the cause.
Ask the technician to inspect the wiring under the passenger dashboard. Wires can get pinched, corroded, or chewed by rodents. This is often the simplest and cheapest fix.

Rodent damage to wiring under the dash is surprisingly common, especially in vehicles that sit outdoors.
If the vehicle has a passenger seat occupancy sensor, have it tested. Some vehicles suppress or adjust the passenger airbag based on whether someone is seated. A bad sensor can trigger B0002.

Occupancy sensor replacement usually costs $200–$500 depending on the vehicle.
Once repaired, verify the airbag warning light turns off after the repair and stays off through several drive cycles.

A light that keeps returning means the fault was not fully corrected.

When to Call a Professional

Never attempt airbag repairs yourself. The system stores high-voltage electrical energy and can deploy the airbag without warning. Accidental airbag deployment causes serious injuries. A qualified technician with a professional scanner is required. Diagnostics run $80–$150. Repairs range from $100 for a wiring fix to $1,000+ for a new passenger airbag assembly.

Frequently Asked Questions

Can the passenger airbag be turned off on purpose?

Some vehicles allow you to disable the passenger airbag manually — usually for placing a rear-facing infant seat in the front. If the airbag was intentionally disabled, this can sometimes trigger a fault code. Check your owner's manual for the airbag on/off switch if your vehicle has one.

My airbag light just came on after a small fender bender — could that cause B0002?

Yes, it's possible. Even a low-speed impact can jolt wiring connectors loose or trigger stored codes in the airbag module. Have the system inspected after any collision, even a minor one. Do not assume the airbags are still functioning correctly after a crash.

How much does it cost to fix B0002?

It depends on the cause. A wiring repair can be as little as $100–$200. An occupancy sensor replacement runs $200–$500. A new passenger airbag assembly can cost $600–$1,200 or more. Always get a diagnosis before assuming the worst.