Driver Airbag Circuit Open
There's an open circuit in the driver airbag wiring.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The computer is seeing that it's not getting the right voltage from the driver airbag circuit; it should be around 2-3 volts when everything is good, and if it's not, that's a problem.
What the computer is actually seeing
The airbag control module monitors the resistance in the driver airbag circuit. If the resistance is too high (indicating an open circuit), it sets the B0125 code.
What a healthy reading looks like
The resistance of the driver airbag should be between 2-3 ohms; if resistance is infinite or zero, there's an issue.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Inspect wiring and connectors in the driver airbag system for visible damage or corrosion. Decision: If damaged, repair or replace as needed.
- 22. Check the airbag connector under the steering column for proper connection and continuity. Decision: If loose or corroded, clean or secure it.
- 33. Measure the resistance across the driver airbag terminals; it should be between 2-3 ohms. Decision: If outside this range, replace the driver airbag.
- 44. If all wiring checks out but the code persists, test the airbag control module for faults. Decision: If the module tests bad, replace it.
Common causes
- Open circuit in the driver airbag wiring
- Faulty airbag connector
- Defective driver airbag module
- Frayed or damaged wires in the steering column
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's not safe to drive; if the airbag system is compromised, it won't deploy in an accident.
Can this code come back after clearing it?
Yes, if there's an underlying problem in the wiring or airbag module that hasn't been fixed.
Why does this code appear with B0030?
B0030 indicates a problem with the passenger airbag circuit; issues with one can affect the other due to shared wiring or connectors.
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