code 278 Lift pump circuit
I recently purchased a 2002 Monaco diplomat with the cummins ISC and when driving it home the warning light would come on intermittently. I have only ran it a few times since with no warning light until starting it tonight. I checked and the code set was 278 lift pump circuit. After shutting the engine off to get the code and then restarting it the warning light stayed off.
Any one have an idea of the cause? Or the problem this would indicate? I am not sure if this code would be from the pressure the lift pump is generating, and thats the circuit the code it referring to or if its referring to an electrical circuit and the voltage is off?
2002 Monaco Diplomat