What causes B0686 on a Chevy?

Faulty instrument panel cluster security indicator driver Security indicator circuit resistance out of range Corroded or loose instrument panel cluster connector Faulty security indicator output in the body control module Chafed security indicator wire between the cluster and body control module

How do I fix B0686 on a Chevy?

Confirm the code with a scan tool Inspect the instrument panel cluster and body control module connectors Test the security indicator circuit for opens, shorts and stray resistance Command the security indicator with the scan tool and watch the lamp Replace the instrument panel cluster or body control module only after circuit tests pass, then clear the code and retest

Code

B0686

Security system indicator circuit range fault

Q: What does B0686 mean on a Chevy?

B0686. Security system indicator circuit range fault. The body control module sees the indicator feedback outside its expected range and the body warning light comes on.. Applies to Chevrolet, GMC, Buick, Cadillac, Pontiac, Oldsmobile and Saturn models that use this code.

Category: Body
Severity: Body Warning 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

B0686. Security system indicator circuit range fault. The body control module sees the indicator feedback outside its expected range and the body warning light comes on.. This Chevy-enhanced code applies to Chevrolet, GMC, Buick, Cadillac, Pontiac, Oldsmobile and Saturn models that use this code.

Findings, check these first

Faulty instrument panel cluster security indicator driver
Security indicator circuit resistance out of range
Corroded or loose instrument panel cluster connector
Faulty security indicator output in the body control module
Chafed security indicator wire between the cluster and body control module

Standard procedure

Confirm the code with a scan tool
Inspect the instrument panel cluster and body control module connectors
Test the security indicator circuit for opens, shorts and stray resistance
Command the security indicator with the scan tool and watch the lamp
Replace the instrument panel cluster or body control module only after circuit tests pass, then 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.

B0686 CHEVROLET Code: Meaning, Causes, and Symptoms | OBD2 Codes - OBD2 Codes
live reference page (obd2-codes.co)
Supports: CHEVROLET and GM-family meaning and likely causes for B0686
Fetched directly. B0686 reads "Security System Indicator Circuit Range/Performance".
Code B0686 meaning and causes | OBDII.pro
live reference page (obdii.pro)
Supports: independent corroboration of the GM meaning
Fetched directly. obdii.pro is a separate publisher and gives the GM meaning as: Security system indicator circuit range/performance More details about the error B0686 and possible reasons for its occurrence.

Last updated 2026-10-10.

Report a correction for B0686. Include your vehicle, the issue and a source if you have one.

This fault sits in the GM theft deterrent system. The GM security codes and Passlock relearn guide covers the families and the relearn cycles.