B2958: Manufacturer-Specific Body Code (commonly Security System Sensor Circuit)
2 vehicles · 1 makes · $150-$800 repair
Most Reported On
B2958 is an OBD-II diagnostic trouble code meaning “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. This code is most commonly reported on 2015-2025 Chevrolet Suburban, and 2000-2005 Chevrolet Malibu, with repair costs ranging from $150 to $800.
Common Causes
Typical Repair Cost
Based on 2 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose B2958, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
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FAQ
What does B2958 mean?
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.
What are the most common causes of B2958?
The most common causes of B2958 are: 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. The specific cause varies by vehicle.
How much does it cost to fix B2958?
Repair costs for B2958 range from $150 to $800, depending on the vehicle and root cause.
Which vehicles are affected by B2958?
Au7o has documented B2958 across 2 vehicle models from 1 manufacturers: Chevrolet.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.