Passenger Seat Belt Switch Fault
Passenger seat belt switch is not functioning properly.
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 passenger seat belt switch detects whether the seat belt is fastened. If it fails, the system thinks the belt is unbuckled, triggering warnings or disabling airbag deployment.
What the computer is actually seeing
The airbag control module sees a constant signal of 0 volts instead of the expected 5 volts when the seat belt is buckled.
What a healthy reading looks like
The passenger seat belt switch should show 5 volts when buckled and 0 volts when unbuckled.
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.
- 1Check the passenger seat belt switch for visible damage or wear.
- 2Inspect the wiring harness for frays or disconnections.
- 3Test voltage at the seat belt switch connector: should be 5 volts when the belt is buckled. If not, check the harness.
- 4If wiring is good and switch is faulty, replace the seat belt switch. If the switch works but the voltage is still not right, look for damage in the wiring or connectors.
Common causes
- Faulty seat belt switch
- Wiring issues (frayed or broken wires)
- Poor connector contact
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It’s better to fix it soon. While you can drive, it may not deploy the airbag correctly in a crash.
Will this code come back after clearing?
If the issue isn’t fixed, yes, it will likely return after driving for a short while.
Why does this code sometimes pair with B0098?
B0098 is often related as it deals with the seat belt switch on the driver's side; issues here can indicate similar problems with passenger systems.
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