Well here is the deal i have a 2006 2500 with 109,000 miles. I have been geting the code for months now and its been runing fun. Last saturday i put my plow on and was on my way home and the truck just about made it home. It just about fell on its face on the highway it went from 80 to 40 with my foot to the floor. I have been reading al the thread about p0148 can cant see to find anything that will help me. I have replaced the lift pump and swaped the injector pump out with the one in my 07 and the truck is still runing the same. Back in the summer i had to replace injector #5 and i know that the other ones are on there way out. If im on the highway it will run great sometimes and others it will have no power at all. When i get down to about 40mph it will shut off but will start right back up.

I need to get this truck fixed befor the snow comes its one of my main trucks.

Any help would be great.

Thanks
Danny

 

could have blown the relief valve on the rail...... causin lower pressure to get to the tips.....

 

Where is the relief valve or is it part of the rail? I swaped the rail pressure sender and that did not help i know thats about $600 to buy new.

 

Relief valve is in on top of the rail, right next to the sensor that you replaced, It has a fuel return line out of the top of it. For testing purposes a bolt can be purchased and stuck in it's place. For further description try the search feature.

Fuel filters OK? Sounds like you need to do more testing instead of swaping parts.

 

Yes the fuel filter is new but you said filters are there more then one that i dont know about?

 

on a stock truck only one filter, unless you call the inlet screen inside the tank pickup another one.

 

What is your fuel pressure? Rail Pressure?

Have you checked voltage at the pump? I know you said your FF is new, have you looked at it? Could it be jelled fuel?

Here is what the dealer says...

Symptom:
P0148-HIGH PRESSURE COMMON RAIL (HPCR) CHECKSUM
When Monitored and Set Condition:
P0148-HIGH PRESSURE COMMON RAIL (HPCR) CHECKSUM
When Monitored: While the engine is running.
Set Condition: A deviation between the fuel pressure set point and the actual fuel
pressure.
POSSIBLE CAUSES
OTHERS DTC’S PRESENT
FUEL LEAKS
FUEL CONTROL ACTUATOR
FUEL PRESSURE SENSOR
CASCADE OVERFLOW VALVE
CHECK VALVE DAMAGED OR BLOCKED
FUEL RETURN LINES OBSTRUCTION, DAMAGE, OR DEBRIS.
LIFT PUMP FLOW
AIR IN FUEL SYSTEM
LEAKING FUEL INJECTORS OR HIGH PRESSURE CONNECTORS
PRESSURE LIMITING VALVE
HIGH PRESSURE FUEL PUMP
INTERMITTENT CONDITION
TEST ACTION APPLICABILITY
1 With the DRBIIIt, read DTCs.
Are any other DTC’s present?
All
Yes ! Repair other DTC’s first.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).
No ! Go To 2
2 Ensure that the fuel level is above 15% using the DRBIIIt.
Visually inspect the low and high pressure side of the fuel system for fuel leaks or
damaged components.
Do you have any fuel leaks or damaged components?
All
Yes ! Repair the fuel leak.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).
No ! Go To 3
73
DRIVEABILITY - DIESEL
TEST ACTION APPLICABILITY
3 Check for a mechanically stuck Fuel Control Actuator (FCA). Using the DRBIIIt,
actuate the fuel control actuator. NOTE: The fuel control actuator will only click
when cycled off.
Do you hear a click from the actuator when you cycle the actuator off with the
DRBIIIt?
All
Yes ! Go To 4
No ! Replace the fuel control actuator.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).
4 Using the DRBIIIt, monitor the fuel pressure reading from the fuel rail pressure
sensor at idle and at 2000 RPM
Is the fuel rail pressure reading higher at 2000 RPM than at idle?
All
Yes ! Go To 5
No ! Replace the fuel pressure sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).
5 Using the DRBIIIt compare the fuel rail pressure set point with the actual fuel rail
pressure.
Is the actual fuel rail pressure higher than the fuel rail pressure set point?
All
Yes ! Go To 6
No ! Go To 9
6 Perform the no trouble code test 9*fuel pump return flow test9 .
Did the fuel injection pump pass the test?
All
Yes ! Go To 7
No ! Replace the Fuel pump.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).
7 Check the fuel drain line check valve in the rear of the cylinder head for signs of
damage, blockage, or debris.
Is the check valve damaged or blocked?
All
Yes ! Repair the cause of the damaged or blocked check valve or replace
the valve.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).
No ! Go To 8
8 Check the fuel return lines for signs of obstruction, damage, or debris.
Are the fuel drain lines damaged or blocked?
All
Yes ! Repair cause of high fuel drain line restriction.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).
No ! Go To 9
74
DRIVEABILITY - DIESEL
P0148-HIGH PRESSURE COMMON RAIL (HPCR) CHECKSUM—Continued
TEST ACTION APPLICABILITY
9 Perform the no trouble code 9Lift Pump flow and inlet restriction test9.
Did the Lift pump pass the test?
All
Yes ! Go To 10
No ! Replace the Lift Pump.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).
10 Perform the no trouble code test 9Fuel system vacuum test9.
Is there air in the fuel system?
All
Yes ! Go To 11
No ! Repair cause of air in fuel system.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).
11 Perform the no trouble code test 9 Pressure Limiting Valve on the Fuel Rail for
internal leaks9.
Did the pressure limiting valve pass the test procedure?
All
Yes ! Go To 12
No ! Replace the Pressure Limiting Valve.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).
12 Perform the no trouble test 9*Injector return flow test9.
Are any Injectors leaking or high pressure connectors leaking?
All
Yes ! Replace or repair the leaking fuel injectors or high pressure
connectors.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).
No ! Go To 13
13 Perform the no trouble code test9HIGH PRESSURE FUEL PUMP PERFORMANCE
TEST9
Did the fuel pump pass the high pressure fuel pump performance test?
All
Yes ! Refer to the INTERMITTENT CONDITION Symptom (Diagnostic
Procedure).
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).
No ! Replace the High pressure fuel pump.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).

 

thats what they did with mine last trip in mad, all the way to the bottom, 6 new injectors, cp3, and lift, somehow they think the lift went bad, sendin stuff downstream, but how on earth it made its way past the filter is beyond me, but hey, they fixed it, and the code went away.