What does B0045 mean on a Chevy?

B0045. Left front driver side deployment loop short to ground or voltage out of range. The module may disable the driver side airbag. Applies to Chevrolet, GMC, Buick, Cadillac, Pontiac, Oldsmobile and Saturn models that use this code.

What causes B0045 on a Chevy?

Open or high resistance in the left front driver side airbag deployment circuit Shorted left front driver side airbag harness rubbing on a metal bracket Corroded or loose connector at the left front driver side airbag Failed left front driver side airbag inflator with an internal open or short Faulty driver inside the sensing and diagnostic module for that loop

How do I fix B0045 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 left front driver side airbag connector and check terminal tension Test the deployment circuit for opens, shorts to ground and shorts to battery Replace the left front driver side airbag only if the circuit tests good, using a qualified SRS technician

Code

B0045

Left front driver side deployment loop short to ground or voltage out of range

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

B0045. Left front driver side deployment loop short to ground or voltage out of range. The module may disable the driver side airbag. 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 left front driver side airbag deployment circuit
Shorted left front driver side airbag harness rubbing on a metal bracket
Corroded or loose connector at the left front driver side airbag
Failed left front driver side airbag inflator 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 left front driver side airbag connector and check terminal tension
Test the deployment circuit for opens, shorts to ground and shorts to battery
Replace the left front driver side airbag 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: checked against the recorded source material.

Code B0045 definition | OBDII.pro
live manufacturer definition (obdii.pro)
Supports: GM manufacturer meaning for B0045
Fetched directly. The GM entry is the brand-family meaning used here. This site is independent of engine-codes and autocodes.
B0045 CHEVROLET Driver Side Deployment Loop Short To Ground/Voltage Out Of Range | 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.
B0045 CHEVROLET Driver Side Deployment Loop Short To Ground/Voltage Out Of Range | 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).

Last updated 2026-09-26.

Report a correction for B0045. Include your vehicle, the issue and a source if you have one.