Circumstances that may cause non-detection are:

• Debris build-up or bumper stickers on the rear bumper sides
• The rear quarter panel of the vehicle is obstructed or partially obstructed by an adjacently parked vehicle or object
• Vehicle approaching at speeds greater than 64 km/h (40 mph)
• Driving in reverse faster than 12 km/h (8 mph)
• Damage to sensor and/or sensor area

Due to the nature of radar technology, there may be certain instances when the CTA system alerts the operator, when no object or vehicle is present while backing up. This is known as a false alert. False alerts up to 3% of the time (3 times out of 100 reversals) are considered normal. A false alert may occur when backing out of a garage or backing into a parking space and objects or vehicles are very close to the radar sensors. False alerts are temporary and self-correcting.

Missed targets occur when a target is present and the LED does not illuminate. Missed targets up to 1% (1 out of 100 targets) is considered normal operation.