Limitations of Cross Traffic Alert

The Cross Traffic Alert (CTA) function may have limitations in certain situations.

CTA does not perform optimally in all situations but has some limitations. For example, the CTA sensors cannot "see" through other parked vehicles or obstructing obstacles.

Here are some examples of situations where CTA’s "field of vision" may be already limited and approaching vehicles cannot therefore be detected until they are very close:

P5-1507-CrossTrafficAlert Princip-Exception1
The car is parked deep inside a parking slot.
P5-1507-CrossTrafficAlert Princip-Exception2
In an angled parking slot CTA may be completely “blind” on one side.
  1. P5-Icon red circle 1Blind CTA sector.
  2. P5-Icon red circle 2Sector in which CTA can detect/“see”.

However, as your car slowly reverses, the angle it makes with the obstructing vehicle/object changes and the blind sector rapidly decreases.

Examples of further limitations:
  • Dirt, ice and snow covering the sensors may reduce the functions and deactivate alerts.
  • CTA is deactivated when a trailer is connected to the car’s electrical system.


The sensors for the CTA function are located inside each corner of the rear wing/bumper. The sensors are also used by the Blind Spot Information (BLIS) function.

P5-1507-CrossTrafficAlert Sensor
Keep the surface clean - on both the left and right-hand sides of the car.

To ensure optimal functionality, the surfaces in front of the sensors must be kept clean.

Do not affix any objects, tape, labels or similar within the area of the sensors.


Repair of the BLIS and CTA functions' components or repainting the bumpers must only be performed by a workshop - an authorised Volvo workshop is recommended.