DTC B2947 Security System Sensor Power CKT Low  
DTC B2948 Security System Sensor Power CKT High  
DTC B2957 Security System Sensor Data Circuit Low  
DTC B2958 Security System Sensor Data Circuit High  
DTC B2960 Sec Sys Sensor Data Incorrect but Valid  
DTC B3031 Security System Controller in Learn Mode  
DTC B3033 Security System Indicates Tamper  
Theft / Security Light

The security system on todays cars and trucks prevents the vehicle from being stolen. There are many variations of the system going back to the early 1990's.

This warning could be on when the engine is running, indicating a fault has been detected in the system. If left unrepaired, there is a good posiblity that the car will eventually not start.

There are several different possibilities for the cause of the warning, depending on the make / model / year of the vehicle. Anything from a bad ignition cylinder wire, to a bad cylinder to a dad Body Control Module (BCM).

After market (non-factory) alarm and remote start systems can cause havoc with the factory theft system, causing this warning light, or a no start.
Theft / Security Trouble Codes

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