Damaged, loose or corroded connector or wiring to the rear left pretensioner, often from seat movement, trim removal or water ingress; Faulty or previously fired rear left seat belt pretensioner; Wiring damage or chafing in the B-pillar, C-pillar or floor harness run; Poor connection at an SRS harness connector or under-seat connector after recent bodywork, trim or seat work; Low or unstable supply voltage to the airbag control unit; Fault inside the airbag control unit's firing circuit driver.

B00E3

Second Row Left Seat Belt Pretensioner C 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
E3: FaultThe specific fault in that area

What it means

B00E3 is the SAE generic code for a fault in the deployment control circuit of the second row left seat belt pretensioner (stage or device C). The airbag control unit tests the firing circuit and logged a fault, such as an open circuit, a short, or resistance outside the expected range. The exact fault type depends on the subtype reported with the code, and the wording and layout of the pretensioner circuits vary by model.

Symptoms

Airbag or SRS warning light on the dashboard
Rear left seat belt warning or restraint system message
Fault may be stored with no other noticeable change
Failed pre-MOT or service inspection because of the SRS warning
Other SRS codes stored alongside it

Possible causes

Damaged, loose or corroded connector or wiring to the rear left pretensioner, often from seat movement, trim removal or water ingresslikely
Faulty or previously fired rear left seat belt pretensionerlikely
Wiring damage or chafing in the B-pillar, C-pillar or floor harness runpossible
Poor connection at an SRS harness connector or under-seat connector after recent bodywork, trim or seat workpossible
Low or unstable supply voltage to the airbag control unitrare
Fault inside the airbag control unit's firing circuit driverrare

How to diagnose

Read all SRS codes with a scan tool that supports restraint systems, and note the fault subtype, status and any freeze frame data.
Ask about or look for a recent collision, trim or rear seat work, water leaks, or previous SRS repairs.
Check battery condition and charging voltage to rule out low voltage as the cause of an intermittent fault.
With the ignition off, the battery disconnected and the waiting time in the manufacturer's procedure observed, inspect the rear left pretensioner connector and harness for damage, corrosion, bent pins or a loose fit.
Check the harness route through the pillar and floor for chafing, pinching or water damage, and confirm that the connector locking and shorting clips are intact.
Do not measure the pretensioner or its circuit with an ordinary multimeter, because there is a risk of accidental deployment. Test only using the manufacturer's procedure and approved SRS-safe equipment.
Check for technical service bulletins and model-specific wiring diagrams for this circuit.
After the repair, clear the code, cycle the ignition and recheck that the SRS light stays off and the code does not return.

How to fix

Repair or replace damaged wiring and connectors in the pretensioner circuit following the manufacturer's repair guidance.
Clean or properly reseat the connector, and replace it if the terminals are corroded or damaged.
Replace the rear left seat belt pretensioner or belt assembly if it is faulty or has fired.
Replace the airbag control unit only if testing confirms an internal fault, and have it coded as the manufacturer requires.
Correct any low battery voltage or supply fault, then clear the code and verify the repair.

Can I keep driving?

High severity

The car can be driven, but the rear left pretensioner may not work in a crash, so book it in promptly. Avoid carrying passengers in that seat until it is repaired.

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