What does B001B mean on a Chevy?

B001B. Passenger seat belt anchor pretensioner deployment circuit fault. The module cannot confirm the loop and lights the airbag warning. Applies to Chevrolet, GMC, Buick, Cadillac, Pontiac, Oldsmobile and Saturn models that use this code.

What causes B001B on a Chevy?

Open or high resistance in the passenger seat belt anchor pretensioner deployment circuit Damaged wiring under the seat track or sill plate Corroded or loose passenger seat belt anchor pretensioner connector Failed passenger seat belt anchor pretensioner with an internal open or short Faulty driver inside the sensing and diagnostic module for that loop

How do I fix B001B on a Chevy?

Confirm the code with a Tech2 or GDS2 and read the loop symptom byte Disconnect the battery and wait at least three minutes before touching any SRS circuit Inspect and reseat the passenger seat belt anchor pretensioner connector and check terminal tension Test the deployment circuit for opens, shorts to ground and shorts to battery Replace the passenger seat belt anchor pretensioner only if the circuit tests good, using a qualified SRS technician

Code

B001B

Passenger seat belt anchor pretensioner deployment circuit fault

Category: Body
Severity: Airbag Light
Applies to: Chevrolet, GMC, Buick, Cadillac, Pontiac, Oldsmobile and Saturn models that use this code
Related: No single generic twin. See OBD Codes List

What it means

B001B. Passenger seat belt anchor pretensioner deployment circuit fault. The module cannot confirm the loop and lights the airbag warning. This Chevy-enhanced code applies to Chevrolet, GMC, Buick, Cadillac, Pontiac, Oldsmobile and Saturn models that use this code.

Findings, check these first

Open or high resistance in the passenger seat belt anchor pretensioner deployment circuit
Damaged wiring under the seat track or sill plate
Corroded or loose passenger seat belt anchor pretensioner connector
Failed passenger seat belt anchor pretensioner with an internal open or short
Faulty driver inside the sensing and diagnostic module for that loop

Standard procedure

Confirm the code with a Tech2 or GDS2 and read the loop symptom byte
Disconnect the battery and wait at least three minutes before touching any SRS circuit
Inspect and reseat the passenger seat belt anchor pretensioner connector and check terminal tension
Test the deployment circuit for opens, shorts to ground and shorts to battery
Replace the passenger seat belt anchor pretensioner only if the circuit tests good, using a qualified SRS technician

Look up another code

Press / to jump to the box. Chevy-enhanced powertrain, body, chassis and network codes.

Sources and review

Review: qualified. Read the source limits below.

B001B CHEVROLET Passenger Seat Belt Anchor Pretensioner Deployment | Engine-Codes.com
archived reference page (engine-codes.com via Wayback Machine)
Supports: Chevrolet meaning and possible causes
Fetched directly. Model and year fitment remain curator claims.
B001B CHEVROLET Passenger Seat Belt Anchor Pretensioner Deployment | AutoCodes.com
archived reference page (autocodes.com via Wayback Machine)
Supports: corroboration of Chevrolet meaning and causes
Same Chevrolet text as the engine-codes page (both sites share one publisher).

Review note: No live obdii.pro GM entry and both archive pages are one publisher, so the passenger seat belt anchor pretensioner meaning rests on one source

Last updated 2026-09-26.

Report a correction for B001B. Include your vehicle, the issue and a source if you have one.