i have a 2001 3500 duramax western hauler i pull a 44 ft enclosed car trailer with it . under a hard pull on steep hills it turns the ck. engine lit on an it will not pull. ihave to clear the codes the code is p0089. what can i do to fix this. with not pulling a trailer it seem to run just fine an no lit comes on help

 

when was the last fuel filter change. check your oil and see if it smells like diesel at all.

and how many miles on the truck?

 

CIRCUIT DESCRIPTION
The engine control module (ECM) uses commanded fuel pump flow to determine a desired fuel rail pressure (FRP). The actual fuel pressure is monitored using the FRP sensor. If the FRP sensor indicates a pressure more than 20 MPa greater than desired, DTC P0089 will set.

CONDITIONS FOR RUNNING THE DTC

• DTCs P0192, P0193, or P1635 are not set.
• The ignition is ON.

CONDITIONS FOR SETTING THE DTC

• The difference between actual and desired FRP is more than 20 MPa .
• Commanded fuel pump flow is 100 cubic mm/second or less.

ACTION TAKEN WHEN THE DTC SETS - CALIFORNIA

• The control module illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails.
• The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Freeze Frame/Failure Records.

ACTION TAKEN WHEN THE DTC SETS - FEDERAL

• The control module stores the DTC information into memory when the diagnostic runs and fails.
• The malfunction indicator lamp (MIL) will not illuminate.
• The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Freeze Frame/Failure Records.
• The driver information center, if equipped, may display a message.

CONDITIONS FOR CLEARING THE MIL/DTC - CALIFORNIA

• The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
• A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
• A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
• Use a scan tool in order to clear the MIL and the DTC.

CONDITIONS FOR CLEARING THE DTC - FEDERAL

• A current DTC Last Test Failed clears when the diagnostic runs and passes.
• A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
• Use a scan tool in order to clear the DTC.

TEST DESCRIPTION

 

hey truck has about 168000 miles on it ,engine has 152000 on it .it blow up at 15000 with pistons in oil pan gm replaced engine. ive owend sents new.fuel filter has been changed 3 times this year have never found no water or dirt in them. i dump my filters to see whats in them. oil stays clean as a pen. i have ck it an never smelt like diesel fuel this has been going on for 11 months truck use to surge at idle i looked around on the net somebody said to put atf in fuel . i put 2 qts of atf in 5 gals of fuel then dumped in both fuel tank an in alittle bit it quit surgeing .i work on big trucks have for 30 year never got into small diesels i have a otc scanner but all it will do is ciear the codes.an it doesnt show much . thanks for your help

 

from what i gather its cp3 related. the injectors are fine im guessing, were they ever replaced?

if you notice that the diagnostic chart points to replacing the Fuel Pressure Regulator which is on the cp3.

Where are you located maybe there is some one near you with a good scan tool

 

Tahts what i wa going to say as well ...Fuel pressure regulator

 

help poo93 code may 2010 i changed the fpr 2 weeks ago an it still turns the ck engine lite on an it wont pull it does this under a hard pull with my trailer on it