Issue:
- Environmental influences; rain, snow, dirt…
- Disconnection
- CPA sensor isn‘t tracked (1)
- Mount of CPA sensor is loose (2)
- Corrosion on electric contact (3)
- Label between CPA sensor and bumper

Solution: it is advisable to  complete cause according to Xentry specification.

Note: If the sensor is removed from its mount or the bumper is taken off,
a complete initial start-up of the CPA sensor is required.
The previously learned offset data will be lost, necessitating a new learning process.