See also:

Underbody
Flush the complete underside of your vehicle frequently. Keep body and door drain holes free from packed dirt. ...

Battery
Your vehicle is equipped with a Motorcraft maintenance-free battery which normally does not require additional water during its life of service. If your battery has a cover/shield, make sur ...

BLIS and/or CTA fault operation
If the BLIS and/or CTA senses a fault on either the left or right sensor, the BLIS alert indicator will go on and remain on and the message center will display BLIND SPOT SYSTEM FAULT or CROSS TRA ...