The Ford Taurus is equipped with an anti-theft system that immobilizes the engine to prevent it from being started. Using the wrong type of key or attempting to start the engine without a properly coded key activates the system. The system is designed to discourage unauthorized attempts to start the Taurus by preventing the engine from turning over. Once the anti-theft system has been activated, it must be disabled before the Taurus will operate. This procedure applies to the 2011 model year Ford Taurus.
Step 1: Press the “unlock” button on the remote entry transmitter.
Step 2: Insert the coded key into the ignition.
Turn the ignition on. The anti-theft light will turn off after approximately three seconds, indicating the system is disabled. Repeat the steps if the light flashes rapidly or stays on for more than a few seconds.