BLIS False Alerts

Due to the nature of radar technology, there may be certain instances when the BLIS will alert with no object present in the blind zone. This is known as a false alert. Some level of false alerts are normal.
Circumstances that may cause a false alert are; guardrails, freeway concrete walls, cyclone fencing, sharp turns around a pole or building, or coming to a stop with a vehicle directly behind but very close. False alerts are temporary and self-correct.
See also:
Day and night brightness
The BLIS and/or CTA alert will automatically dim when the headlamp
switch is in PARK, ON, or AUTO ON and night time darkness has been
detected by the sun sensor. ...
Lane keeping system
The newly available Lane Keeping System adds to the advanced capabilities
already offered on MKT, including collision warning and BLIS® (Blind Spot
Information System) with cross-traffic alert.
La ...
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 ...
