B3031 on Chevrolet
Security System Controller in Learn Mode
B3031 on Chevrolet vehicles indicates security system controller in learn mode. Au7o has documented this code across 2 Chevrolet models — most commonly on Colorado, Malibu. B3031 is a manufacturer-specific body code (common on GM vehicles) indicating the body control module has entered, or is stuck in, the security/anti-theft key learn mode. It is often an informational status rather than a true failure, set automatically while a coded key is being programmed and cleared once learning completes. It only indicates a real fault if the module fails to exit learn mode, which can disable starting and illuminate the security indicator. Typical repair costs on Chevrolet range from $250 to $800, depending on the specific model and root cause.
Common Causes of B3031
- •Module currently in normal key-learning procedure (informational)
- •Key programming not completed correctly
- •Failed key relearn / fewer than required keys learned
- •Faulty or unrecognized transponder key
- •BCM software or programming fault
- •Faulty body control module preventing learn-mode exit
B3031 on Chevrolet by Model
Chevrolet Colorado(1 issue)
- Passlock Ignition Switch Failure Causing No-Start and Security Light2004-2012
First-generation Colorado/Canyon trucks commonly suffer from Passlock-related ignition switch failures that trigger a crank-no-start or start-and-stall condition with the security light illuminated. Owners often report the truck starting normally after a 10-minute relearn wait, then failing again later. GM issued service information on theft deterrent and ignition switch diagnosis, and the issue is widely documented in owner complaints and forums.
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.
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View B3031 across all makes →Frequently Asked Questions
What does B3031 mean on Chevrolet?▼
B3031 stands for "Security System Controller in Learn Mode." B3031 is a manufacturer-specific body code (common on GM vehicles) indicating the body control module has entered, or is stuck in, the security/anti-theft key learn mode. It is often an informational status rather than a true failure, set automatically while a coded key is being programmed and cleared once learning completes. It only indicates a real fault if the module fails to exit learn mode, which can disable starting and illuminate the security indicator. On Chevrolet specifically, this code is documented across 2 models.
What causes B3031 on Chevrolet vehicles?▼
Common causes on Chevrolet: Module currently in normal key-learning procedure (informational), Key programming not completed correctly, Failed key relearn / fewer than required keys learned, Faulty or unrecognized transponder key, BCM software or programming fault. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix B3031 on a Chevrolet?▼
Repair costs on Chevrolet range from $250 to $800, depending on the specific model and root cause.
Which Chevrolet models have B3031 documented?▼
Au7o has documented B3031 on 2 Chevrolet models: Colorado, Malibu.