When the System Does Not Seem to Work Properly- Page 215

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When the System Does Not Seem to Work Properly

The light will flash red when shifting into REVERSE (R)
if a trailer was attached to your vehicle, or a bicycle or an
object was on the back of, or hanging out of your liftgate
during your last drive cycle. The light will continue to
flash whenever in REVERSE (R), until your vehicle is
driven forward at least 15 mph (25 km/h) without any
obstructions behind the vehicle.

It may also flash red if the ultrasonic sensors are not
kept clean. So be sure to keep your rear bumper free of
mud, dirt, snow, ice and slush or the system may not
work properly. Other conditions that may affect system
performance include things like the vibrations from a
jackhammer or the compression of air brakes on a very
large truck. If after cleaning the rear bumper and then
driving forward at least 15 mph (25 km/h), the display
continues to flash red, see your dealer.

As always, drivers should use care when backing up a
vehicle. Always look behind you, being sure to check
for other vehicles, obstructions and blind spots. 
For cleaning instructions, see “Cleaning Your Vehicle”
in the Index.