Please Help With Codes Asap

[ROCKJEEP]

I have the truck in the shop for some work. There was a P0148 and P0541 code. I know what the codes mean, but don't know what will cause them. I have a ex on 5 and afe with torque tube and 4" stright pipie. PLEASE HELP The dealer is scratching there heads. :{

 

[BIG BOB]

P0148 Fuel Delivery Error



P0541 Intake Air Heater Relay 1 Low

 

[rbattelle]

P0148 - High Pressure Common Rail Checksum

Set condition: a deviation between the fuel pressure check point and the actual fuel pressure.

Possible causes:

-Fuel leaks

-Fuel control actuator

-Fuel pressure sensor

-Cascade overflow valve

-Check valve damaged or blocked

-Fuel return line obstruction, damage, or debris

-Lift pump flow

-Air in fuel system

-Leaking fuel injectors or high pressure connections

-Pressure limiting valve

-High pressure fuel pump



P0541 - Low voltage at the #1 intake air heater relay

Set Condition: When the intake signal from the #1 intake air heater does not match the signal from the #1 intake air heater feedback.

Possible causes:

-Loose connection

-Intake air heater relay

-Signal circuit open from relay to ECM

-Signal circuit shorted to battery negative

-ECM



For P0148 I blame your fueling box. Remove it and the problems will disappear magically. If I had a nickel for every time someone with a fueling box got this code I'd be very wealthy.

For P0541, I'm not sure whether your fueling box has any influence on the grid heaters. You'd have to contact their tech department to find out.



I hope that helps.

-Ryan

 

[tgbol]

i got the 0541 code after working on my truck. When I checked it out I discovered that I had knocked the connector off of the solenoid. It looked like it was connected but wasn't.