What it means
Fault on the deployment circuit of the driver inflatable seat belt. Inflatable belts (e.g. Ford rear-seat system) widen the belt webbing on impact to spread crash loads over a larger area.
At a glance
- Usually lights the airbag (SRS) or body-system warning light
How it works
The restraint control module monitors the driver’s inflatable seatbelt deployment circuit; this belt contains an inflator designed to widen the webbing in a crash. B00F0 is set when the circuit’s electrical reading is outside the expected range, so the driver’s inflatable belt may not deploy as intended.
Common causes
Most likely first.
- Open or short in inflatable belt deployment circuit
- Damaged wiring or connector
- Failed belt inflator
- Fault in the restraint control module
Symptoms
- Warning light or symbol related to the affected system
- Comfort or safety function impaired
How to diagnose it
- Use a restraint-capable scan tool to confirm B00F0, check for other airbag or belt codes, and preserve freeze-frame information before clearing codes.
- Inspect the driver’s inflatable belt, retractor area, and visible wiring for damage, contamination, or signs of previous collision repair.
- With the restraint system disabled exactly as the manufacturer directs, inspect the driver belt deployment connector and harness for looseness, corrosion, damaged pins, or chafing.
- Test the driver inflatable belt circuit for an open or short using the approved procedure; never apply a test light or ordinary meter directly to the inflator.
- If the circuit passes, use the maker’s diagnostic steps to determine whether the driver belt inflator or restraint control module has failed.
Common fixes
- Secure a loose driver inflatable belt connector or repair damaged circuit wiring using the approved procedure.
- Replace a damaged connector or harness section found in the deployment circuit.
- Replace the driver inflatable seatbelt assembly if testing confirms an inflator fault.
- Repair or replace the restraint control module if diagnosis verifies an internal module failure.
Can I keep driving?
The driver’s inflatable belt may not widen and distribute crash loads as designed, and the restraint system may have reduced protection. Have the fault repaired before driving if possible; do not dismantle or electrically test the belt inflator outside the maker’s safety procedure.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.