B2958 on Chevrolet
Manufacturer-Specific Body Code (commonly Security System Sensor Circuit)
B2958 on Chevrolet vehicles indicates manufacturer-specific body code (commonly security system sensor circuit). Au7o has documented this code across 2 Chevrolet models — most commonly on Malibu, Suburban. B2958 is a manufacturer-specific body code, so its exact meaning varies by automaker. On many GM vehicles it indicates a Security/Anti-Theft System Sensor Circuit fault (signal out of range, often reading high), where the Body Control Module sees an abnormal voltage from a theft-deterrent sensor; on some other makes it relates to an HVAC/defrost door circuit. Because the definition is not standardized, the precise cause should be confirmed against the specific make and model. It is generally a comfort/security-system fault rather than a safety-critical driveability issue. Typical repair costs on Chevrolet range from $150 to $800, depending on the specific model and root cause.
Common Causes of B2958
- •Faulty security/anti-theft sensor (GM applications)
- •Wiring or connector fault in the affected circuit
- •Short to voltage or open in the sensor circuit
- •Failing Body Control Module (BCM)
- •HVAC blend/defrost door actuator fault (on makes that use it for HVAC)
- •Corroded grounds or poor connections
B2958 on Chevrolet by Model
Chevrolet Malibu(1 issue)
- Passlock Anti-Theft System Causing No-Start and Intermittent Stalling2000-2005
A common failure on early-2000s Malibu models is the Passlock security system falsely detecting a theft condition, which can disable fuel delivery and prevent the engine from starting. Owners report the SECURITY light flashing, long wait times before restart, and in some cases intermittent stalling or crank-no-start behavior. The root cause is typically failure in the ignition lock cylinder sensor/housing or related wiring causing incorrect resistance/voltage readings to the body control module.
Chevrolet Suburban(1 issue)
- Steering Column Lock and Click Noise2015-2025
The 2015+ Suburban uses an electronic steering column lock that can malfunction, causing a clicking noise from the steering column, failure to recognize the key fob, or preventing the vehicle from starting. The electronic lock module replaces the traditional key-cylinder lock and communicates with the body control module (BCM) to verify the key fob is present before allowing the engine to start. When the lock module fails, it may click repeatedly without unlocking, or it may not engage at all, leaving the steering unlocked even when the vehicle is off.
Looking for B2958 on a different make?
View B2958 across all makes →Frequently Asked Questions
What does B2958 mean on Chevrolet?▼
B2958 stands for "Manufacturer-Specific Body Code (commonly Security System Sensor Circuit)." B2958 is a manufacturer-specific body code, so its exact meaning varies by automaker. On many GM vehicles it indicates a Security/Anti-Theft System Sensor Circuit fault (signal out of range, often reading high), where the Body Control Module sees an abnormal voltage from a theft-deterrent sensor; on some other makes it relates to an HVAC/defrost door circuit. Because the definition is not standardized, the precise cause should be confirmed against the specific make and model. It is generally a comfort/security-system fault rather than a safety-critical driveability issue. On Chevrolet specifically, this code is documented across 2 models.
What causes B2958 on Chevrolet vehicles?▼
Common causes on Chevrolet: Faulty security/anti-theft sensor (GM applications), Wiring or connector fault in the affected circuit, Short to voltage or open in the sensor circuit, Failing Body Control Module (BCM), HVAC blend/defrost door actuator fault (on makes that use it for HVAC). Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix B2958 on a Chevrolet?▼
Repair costs on Chevrolet range from $150 to $800, depending on the specific model and root cause.
Which Chevrolet models have B2958 documented?▼
Au7o has documented B2958 on 2 Chevrolet models: Malibu, Suburban.