NHTSA Complaint #11423292 — 2018 CHRYSLER PACIFICA PLUG-IN HYBRID

I have small grandchildren who play in the driveway area occasionally and I purchased a vehicle with parking collision warning features as an essential safety feature. The front center collision warning stopped working and when taken to the dealer twice they cannot confirm the defect because they test by walking in front of the car from the side. This activates sensors on the side but cannot identify a problem with the front sensor. They also drive the vehicle into a service bay which also activates the side sensors and does not detect the problem with the front sensor. We will try a third time with the dealer to have the problem addressed, but my concern is that current service guidelines for assessing function of the system are inadequate and should be addressed by appropriate training. I have no safe way of evaluating whether this problem effects the collision warning system.