B1350 B0xxx · Body (B) High severity
Airbag Deployment Loop / Squib Circuit Resistance Out of Range
Resistance in a restraint deployment loop is outside specification. Even a small extra resistance can prevent deployment.
Severity guidance: High — stop driving and diagnose now; risk of further damage
Symptoms you will notice
- Airbag lamp on
- Restraint system disabled
Common causes
Ordered from most to least likely — start at the top.
- 1 Corroded or loose connector terminal
- 2 Partially broken wire
- 3 Aftermarket audio or dash work disturbing the harness
- 4 Non-approved component fitted
How to diagnose it
Cheapest and least invasive first — most of these codes are not a parts problem.
- ✓ Follow the airbag safety procedure before touching the circuit.
- ✓ Read the stored resistance value from the ECU and compare with specification.
- ✓ Check every connector in the flagged loop for fretting corrosion.
- ✓ Look for evidence of previous aftermarket work.
Repair options
- Clean or replace the affected connector
- Repair the wiring
- Replace non-approved components with correct parts
B1350 — frequently asked questions
Can a slightly high resistance really matter? +
Yes. Deployment energy is calculated for the specified loop resistance; extra resistance can mean no deployment.
Can I solder the repair? +
Follow the manufacturer's guidance — many require crimped splices and prohibit solder in restraint circuits.
Confirm the diagnosis before you buy parts
Send us the code, freeze-frame data and the vehicle — our engineers will tell you what to test first.