I was coming home from a road trip and about 200 miles from home when my check engine light came on. At the same time I noticed that the van was switching rapidly between the gas engine and the battery. I stopped and talked to a dealer service along the way and was advised to have the car checked out when I got home. I was told that as long as the check engine light wasn't flashing that it was safe to drive. When I had the dealer check it out (after waiting 2 weeks for an appointment), I was told that the battery cooler was defective and I needed a new one. My dealers service dept said this has become a problem with Pacifica hybrids and the needed part was on back order and they didn't know when they could get the replacement part. I don't feel that the van is safe to drive but the prospect of being in a rental car for weeks or months is not very pleasant. Anyone else have this problem?