2003 Cadillac CTS

For your Cadillac's theft deterrent system, when you insert the key into the ignition coils around the ignition energize a transponder in the key. Do you have the same behavior with both of your keys?

Security Indicator Stays Illuminated and Engine Starts

Theft system could not measure transponder value or the ECM lost communication with the system while the engine was last running.

Security Indicator Illuminates when Engine is Running

Same while currently running.

Security Indicator Illuminated and Engine Does Not Start

System unable to read the transponder, or problem with the system or system is in learn mode.

Security Indicator Flashes and Engine Does Not Start

Incorrect value measured for transponder, or the calculation to the challenge is incorrect, or the ECM lost communication. This is considered a tamper condition.