Passenger Airbag Fault
Indicates a malfunction in the passenger airbag system.
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 car's computer is detecting a problem with the passenger's airbag. This could mean it's not ready to deploy in an accident, which is a safety issue.
What the computer is actually seeing
The airbag control module monitors the passenger airbag system for faults. When a fault is detected, a diagnostic trouble code (DTC) like B1629 is stored, and the airbag warning light may come on the dashboard.
What a healthy reading looks like
The system typically expects the passenger airbag to have a resistance value in the range of 2-5 ohms. If resistance is out of this range, a fault will be logged.
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 the airbag warning light and confirm that it's illuminated. If not, the issue may not be current.
- 22. Check for any signs of physical damage to the airbag system wiring and connectors under the passenger seat.
- 33. Use a multimeter to check the resistance of the passenger airbag circuit - should be between 2-5 ohms. If outside this range, note any discrepancies.
- 44. Inspect the connectors for corrosion or loose connections; repair as needed. Clear the code and retest.
- 55. If the code returns, consider testing or replacing the passenger airbag module and testing the seat sensor.
Common causes
- Faulty passenger airbag module
- Wiring issues or short circuits in the airbag circuit
- Damaged connectors or terminals
- Faulty seat sensor (if applicable)
- Open circuit due to disconnection or damage
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
No, as this affects the passenger airbag system, it's crucial to resolve immediately for safety.
Will this code come back after clearing it?
If the underlying issue isn't fixed, like a bad airbag module or wiring problem, yes, it will return.
Why do I see related codes with this one?
Related codes typically indicate issues with components working together in the airbag system, like additional faults in the same circuit.
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