Damaged, corroded or loose connector at the passenger inflatable belt or its seat-area wiring; Wiring fault (open circuit, high resistance or short) between the restraint control unit and the inflatable belt deployment circuit; Fault in the inflatable belt assembly or its deployment device; Damage to the seat or under-seat wiring from seat movement, trapped cables or previous repair work; Low supply voltage or poor earth to the restraint control unit; Internal fault in the restraint control unit; Crash-related damage or a previously deployed component not fully replaced.

B00F1

Passenger Inflatable Seat Belt Deployment Control.

Generic
Body
Generic code
High severity

How this code is built

B: SystemBody
0: Defined bySAE, the same on every car
0: AreaBody area 0
F1: FaultThe specific fault in that area

What it means

B00F1 relates to the passenger inflatable seat belt deployment control, part of the supplemental restraint system (SRS). The restraint control unit has detected a fault in the control or deployment circuit or function for the passenger's inflatable belt. The exact trigger, such as resistance out of range, open circuit, short or internal fault, depends on the model and system design.

Symptoms

Airbag or SRS warning light on the dashboard
Passenger airbag or seat belt warning showing in the instrument cluster
Fault stored in the SRS control unit that returns after clearing
Passenger inflatable belt may not deploy in a crash
Possible MOT failure due to the SRS warning light

Possible causes

Damaged, corroded or loose connector at the passenger inflatable belt or its seat-area wiringlikely
Wiring fault (open circuit, high resistance or short) between the restraint control unit and the inflatable belt deployment circuitlikely
Fault in the inflatable belt assembly or its deployment devicepossible
Damage to the seat or under-seat wiring from seat movement, trapped cables or previous repair workpossible
Low supply voltage or poor earth to the restraint control unitpossible
Internal fault in the restraint control unitrare
Crash-related damage or a previously deployed component not fully replacedrare

How to diagnose

Read all stored codes and freeze frame data from the SRS control unit, and note whether the fault is current or historic and whether other SRS codes are present.
Check the vehicle history for crash damage, seat removal or recent trim and upholstery work around the passenger seat.
Follow the manufacturer's SRS safety procedure (battery disconnected and wait time observed) before touching any restraint components.
Visually inspect the passenger seat and belt wiring and connectors for damage, pinching, corrosion or poor locking of the connector.
Check battery condition and the supply and earth to the restraint control unit.
With the safety procedure observed, carry out circuit checks using manufacturer data. Never probe or apply test voltage to deployment circuits directly.
Use the manufacturer's diagnostic routine for the inflatable belt, as the test procedure varies by model.
Clear the code after repair and recheck that the SRS light stays off and the fault does not return.

How to fix

Repair or replace damaged wiring or connectors in the passenger inflatable belt circuit.
Secure and correctly reseat connectors, and re-route cables so they are not trapped by seat movement.
Replace the passenger inflatable belt assembly if it is confirmed faulty or has been involved in a crash, as the manufacturer specifies.
Correct battery, supply or earth faults affecting the restraint control unit.
Replace or reprogram the restraint control unit only if testing confirms an internal fault, following manufacturer procedure.

Can I keep driving?

High severity

The car will usually still drive, but the passenger inflatable belt may not work in a collision, so avoid carrying a passenger in that seat and have the SRS system inspected promptly. Do not ignore the warning light.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.