I bought a 2005 Dodge grand caravan sxt. The overhead info center tells me service park assist system. Most of the time it works great but sometimes when i am driving the message pops up and then it stops working. Any ideas?

Faulty sensor in teh bumper or bad connection, im not sure where the main module is on them. most likely in rear pannel, dr or pass side, check for rock beaten wires under the back of the van.

Have you since resolved this issue? I have been reading and reading online as our 2006 Dodge Grand Caravan is stating the same thing, Service Park Assist. Sensors all look fine, no bumper damage. How do you tell if its a sensor, which sensor? And if it's not the sensors where else do you start looking?