ACC not available

Several conditions exist which can cause ACC to deactivate or prevent ACC from activating when requested. These conditions include:
• The sensor is blocked, refer to Blocked sensor in this section.
• Brake temperature is high, refer to Hilly condition usage in this
section.
• A failure has occurred in the ACC system or related system.
See also:
Replacing lost integrated keyhead transmitters (IKTs)
If you would like to have your integrated keyhead transmitters
reprogrammed because you lost one, or would like to buy additional
IKTs, you can either reprogram them yourself, or take all IKTs to ...
Improved performance without sacrificing fuel economy
Power for the 2011 Lincoln MKX is supplied by the 3.7-liter Duratec V-6,
which employs advanced technology and clever control strategies, such as Twin
Independent Variable Camshaft Timing (Ti-VCT) ...
Programming
Do not program HomeLink with the vehicle parked in the garage.
Note: Your vehicle may require the ignition switch to be turned to the
accessory position for programming and/or operation of the Home ...
