Warning Code 278 following lift pump replacement

[Catch14me]

My lift pump was replaced due to a leak and now the dash warning light comes on within about a minute. The diagnostics code indicated is 278 which indicates lift pump circuit. The RV is a 2003 Monaco Camelot with a 350 Cummins ISC. Mileage is 39,599 miles. The replacement pump came from Cummins and was described as a "universal'" newer pump which fits my engine. We have checked everything we can think of and the RV has had filters changed and new fluids. I would like to avoid the Cummins shop if possible if there is something else we may due to troubleshoot.

[PandK]

Not sure if this will help or you may already have this information. See tha attached:

[Catch14me]

Quote:

Originally Posted by PandK Not sure if this will help or you may already have this information. See tha attached:

Thanks for the pdf files. After another round of checking the connections and incidentally finding a tool that had apparently fallen during the course of the install and lodged in the vicinity of the lift pump the warning light has gone out.

[deandec]

Glad you were able to solve the problem with no cash to Cummins.

Thank you for closing out the story.