heres the deal for the past three months i have been dealing with my CEL light coming on and off, dealer is at wits end but we do have some good info, i think anyways, heres the deal my fuel pressue sensor voltage is telling the computer it wants anways between 70-90 volts, well normal voltage is 1.5-3.5 tops, we took a fuel pressure sensor off a BRAND new truck and the light still came on, meaning that the sensor is not bad, we also put on a new fuel control accuator to see if that had any issues with this, well that didnt change a thing.
My question is what would the cause be? any ideas at all?? here is what we are afraid of i did the bully dog try before you buy thing back in july, it wasnt in there more than maybe 6 hours, then after i did that i had them do the reflash for better fuel economy thing. If dealer calls star and reads these numbers etc, is star going to say, warrenty void because customer had a downloader in it?? or would the tri-b4 u buy thing totally have erased its self?? any help please???

 

fill out your sig..
I posted in the other thread you started what year is this truck?? new??

 

here is waht the code means, is this the ONLY code they have found?

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

I know a few have had the check valve go bad??

 

yes this is the only code, and truck is an 05 with 40000

 

Could you fill out your sig, please?