Last fall the dealer inidcated my 2015 Cherokee Trailhawk needed a number of reflashes. Prior to them I was averaging 20+ combined MPG. Since the reflash, I have seen this drop to below 18 in warmer weather to as low as 14 MPG in winter weather. I have noticed that the RPM's are higher for the shift points.
The dealer says it is all good, and it is the reformulated (winter blend) gas. I can't believe it would make that much difference, and didn't seem to last winter. I had another dealer look at it and they reflashed the transmission, but that made no difference.
The flashes that were done include: RFH, BCM, IPC, HAVC, EPB, PCM, and TCM.
Anyone else experiencing similar issues? I bought the Cherokee over the GC, as I wanted better mileage, which I was happy with before the reflash. Now, it's not much different from my old 2005 GC.
Help!
The dealer says it is all good, and it is the reformulated (winter blend) gas. I can't believe it would make that much difference, and didn't seem to last winter. I had another dealer look at it and they reflashed the transmission, but that made no difference.
The flashes that were done include: RFH, BCM, IPC, HAVC, EPB, PCM, and TCM.
Anyone else experiencing similar issues? I bought the Cherokee over the GC, as I wanted better mileage, which I was happy with before the reflash. Now, it's not much different from my old 2005 GC.
Help!