What does B0064 mean on a Chevy?

B0064. Left front driver pretensioner deployment loop resistance reads low. A shorted loop can stop the pretensioner from firing. Applies to Chevrolet, GMC, Buick, Cadillac, Pontiac, Oldsmobile and Saturn models that use this code.

What causes B0064 on a Chevy?

Shorted left front driver pretensioner deployment loop Left front driver pretensioner wiring damaged under the seat track or sill plate Corroded or bridged left front driver pretensioner connector Left front driver pretensioner with an internal shorted squib Faulty driver inside the sensing and diagnostic module for that loop

How do I fix B0064 on a Chevy?

Confirm the code with a Tech2 or GDS2 and read the left front driver pretensioner loop resistance Disconnect the battery and wait at least three minutes before touching any SRS circuit Inspect the left front driver pretensioner connector and the wiring under the seat track Measure the loop for a short between its two wires and to ground Replace the left front driver pretensioner only if the wiring tests good, using a qualified SRS technician Clear the code and retest

Code

B0064

Left front driver pretensioner deployment loop resistance reads low

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

B0064. Left front driver pretensioner deployment loop resistance reads low. A shorted loop can stop the pretensioner from firing. This Chevy-enhanced code applies to Chevrolet, GMC, Buick, Cadillac, Pontiac, Oldsmobile and Saturn models that use this code.

Findings, check these first

Shorted left front driver pretensioner deployment loop
Left front driver pretensioner wiring damaged under the seat track or sill plate
Corroded or bridged left front driver pretensioner connector
Left front driver pretensioner with an internal shorted squib
Faulty driver inside the sensing and diagnostic module for that loop

Standard procedure

Confirm the code with a Tech2 or GDS2 and read the left front driver pretensioner loop resistance
Disconnect the battery and wait at least three minutes before touching any SRS circuit
Inspect the left front driver pretensioner connector and the wiring under the seat track
Measure the loop for a short between its two wires and to ground
Replace the left front driver pretensioner only if the wiring tests good, using a qualified SRS technician
Clear the code and retest

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 B0064 definition | OBDII.pro
live manufacturer definition (obdii.pro)
Supports: GM manufacturer meaning for B0064
Fetched directly. The GM entry is the brand-family meaning used here. This site is independent of engine-codes and autocodes.
B0064 CHEVROLET Left Front/Driver Pretensioner Deployment Loop Resistance Low | 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.
B0064 CHEVROLET Left Front/Driver Pretensioner Deployment Loop Resistance Low | 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 2026-10-10.

Report a correction for B0064. Include your vehicle, the issue and a source if you have one.