Damaged, pinched or chafed wiring to the third row left restraint, often where the seat folds or slides; Poor connection at the yellow SRS connector under or near the third row left seat, such as corrosion, bent pins or a loose connector; Faulty restraint device or its initiator circuit, with resistance out of range; Seat or trim recently removed or refitted with the connector left unplugged or badly seated; Fault in the restraint control module output stage; Water ingress or previous crash damage affecting the circuit.

B0041

Third Row Left Frontal Stage 1 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
41: FaultThe specific fault in that area

What it means

B0041 is a generic SRS (airbag) code relating to the deployment control circuit for the third row left frontal stage 1 restraint. The restraint control module found a fault in that circuit, such as an open circuit, short, abnormal resistance or a module-side fault, and switched off that deployment output. The exact fault type depends on the manufacturer's sub-code, and not every vehicle has a third-row frontal restraint, so the meaning depends on the model.

Symptoms

Airbag or SRS warning light on
Third row left restraint may not deploy in a crash
Other SRS faults stored alongside it
Intermittent warning light after the third row seat is moved or folded
Failed MOT or safety inspection due to the warning light

Possible causes

Damaged, pinched or chafed wiring to the third row left restraint, often where the seat folds or slideslikely
Poor connection at the yellow SRS connector under or near the third row left seat, such as corrosion, bent pins or a loose connectorlikely
Faulty restraint device or its initiator circuit, with resistance out of rangepossible
Seat or trim recently removed or refitted with the connector left unplugged or badly seatedpossible
Fault in the restraint control module output stagerare
Water ingress or previous crash damage affecting the circuitrare

How to diagnose

Read all stored and pending SRS codes with a scan tool that supports the airbag system, and note any sub-code or status bytes and freeze frame data.
Check the vehicle's service history for recent seat, trim or SRS work, or any previous accident repairs.
Make the system safe before touching any SRS parts: switch off the ignition, disconnect the battery and wait for the time stated in the manufacturer's procedure.
Visually inspect the SRS wiring and connectors around the third row left seat for damage, corrosion, water, pinching or incorrect routing.
Check the connector locking mechanisms and terminal tension, and confirm the connector is fully seated.
Using the manufacturer's procedure, check circuit resistance and short-to-ground or short-to-voltage faults on the harness only. Never probe or apply test voltage to the restraint device directly.
Check whether the vehicle has a third row frontal restraint fitted and what the wiring diagram shows for your model and equipment level.
After repair, clear the codes, cycle the ignition and confirm the fault does not return.

How to fix

Repair or replace damaged SRS wiring using the manufacturer's approved method, with no unapproved splices.
Clean, repair or replace corroded or damaged SRS connectors and reseat them correctly.
Replace the faulty restraint device if the manufacturer's tests confirm it is at fault.
Correct the routing and fixings of the harness so it is not trapped when the seat moves or folds.
Replace or repair the restraint control module only after wiring and device faults are ruled out, following the manufacturer's procedure.

Can I keep driving?

High severity

The car can usually be driven carefully to a workshop, but the restraint may not work in a crash, so book it in promptly. Avoid carrying passengers in the affected seat until it is repaired.

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