"Check Engine" comes on when towing

[JonPalmer]

Every time I tow my trailer about 12,000# my check engine light comes on. The code is P0148 "high pressure common rail checksum". The dealer has been clearing the code and checking the truck out everytime it comes on but has not solved the problem. Any ideas? I have an edge chip and Mopar injectors but the light comes on when chip is at "0", "1", and "2". the light has also come on while empty (not towing) running 70mph up 10% grade. EGT's are under 1100 and boost will hit 34.



Jon

2004. 5 3500SRW, Edge, K&N intake, Mopar performance injectors.