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FPCM codes. Cuts out with moderate acceleration.

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This is the problem. When 3/4 to full throttle the truck seems to act as if its out of fuel. Cuts out and bucks and jerks. At easy throttle I can run it to 6000 rpm no problem. Any load or full throttle has issues. Finally got a CEL. P0191 (rail press circ voltage range) and P069e (FPCM Req MIL illum). Truck is 2007 silverado 4x4. 6.0l. 112k miles. Tuned 40k miles ago. Just now having issues. Not been to dealer yet... Any thoughts?

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Get a fuel pressure gauge on it to see if it really has low pressure or if it is just the sensor. The pressure regulator, filter, and pump are one unit so they all get replaced together.

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#09-06-04-022B: Malfunction Indicator Lamp (MIL) Illuminated, Intermittent DTC P0191, Slow Fuel Rail Pressure (FRP) Decay, Wiring Harness Connections, Voltage Fluctuations/Interruptions (Follow Correction Information - (Jan 28, 2010)

 

 

 

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Subject: Malfunction Indicator Lamp (MIL) Illuminated, Intermittent DTC P0191, Slow Fuel Rail Pressure (FRP) Decay, Wiring Harness Connections, Voltage Fluctuations/Interruptions (Follow Correction Information Below)

 

 

 

 

Models: 2006–2009 Chevrolet Express, Kodiak, Silverado

 

 

 

2006–2009 GMC Savana, Sierra, TopKick

 

 

 

Equipped With Duramax™ Diesel Engine (RPOs LLY, LBZ, LMM)

 

 

 

Please Refer to GMVIS

 

 

This bulletin is being revised to update the reprogramming emission controller warranty coverage period information. Please discard Corporate Bulletin Number 09-06-04-022A (Section 06 — Engine/Propulsion System).

Condition

 

Some customers may comment that the malfunction indicator lamp (MIL) is illuminated, or it illuminates intermittently.

The technician may find DTC P0191 set as current or in history.

Causes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Correction

 

Verify the model year of the vehicle in order to determine which one or both of the following procedures to utilize.

For 2006-2008 Vehicles – Diagnose Possible Slow Fuel Rail Pressure Decay First

Important: DO NOT replace the ECM, the fuel rail pressure regulator, or the fuel rail pressure sensor for this condition.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Important: If a 2006-2007 LLY, LBZ vehicle has, as one of nine ECM module ID Part Numbers, Part Number 12632483, then reprogramming the ECM will not repair this condition. If a 2007i-2008 LMM vehicle had field action V1819 - 08142 ECM EEPROM - REPROGRAM ECM applied, then reprogramming the ECM will not repair this condition. All 2009 LMM's already have an extended rail pressure bleed down calibration.

 

A revised software calibration has been released to address this condition. Reprogram the ECM using the Service Programming System (SPS) with the latest calibration available on TIS2WEB. Refer to the SPS procedures in SI.

When using a multiple diagnostic interface (MDI) for reprogramming, ensure that it is updated with the latest software version.

When using a Tech 2® for reprogramming, ensure that it is updated with the latest software version.

During programming, the battery voltage must be maintained within the proper range of 12-15 Volts. Only use the approved Midtronics® PSC 550 Battery Maintainer (SPS Programming Support Tool EL-49642) or equivalent during programming.

For 2006-2009 Vehicles – Use The Following Testing Procedures

Important: DO NOT replace the ECM, the fuel rail pressure regulator, or the fuel rail pressure sensor for this condition.

 

Wiring Harness Conditions

A secondary cause of DTC P0191 may result from a poor connection at the pigtail connector, or the engine harness connector, incorrect crimps, corrosion, and/or poor terminal tension.

 

 

 

 

 

 

 

Voltage Fluctuations/Interruptions at Key Up

Voltage fluctuations at key up, which false trigger a DTC P0191 can be very brief (less than 1 second) and may occur due to any aftermarket equipment installed on the vehicle.

Important: Aftermarket electrical equipment should have a diode connected across the power circuit (coil side) of the relay or solenoid being used in order to prevent transient voltage spikes. For more information on this subject, refer to Corporate Bulletin Number 08-08-45-004A.

 

Inspect for the proper installation and operation of any aftermarket equipment that may interrupt/interfere with the ignition voltage to the ECM. Refer to Checking Aftermarket Accessories in SI.

The following list is an indication of some of the types of aftermarket equipment that upfitters install.

 

 

 

 

 

 

 

 

 

 

 

<a href="http://gsi.xw.gm.com/newsi/showDoc.do?docSyskey=2390143&from=sm#N65824">

Warranty Information

 

For vehicles reprogrammed under the 5 year / 100,000 mile (160,000 km) DURAMAX™ Diesel Engine warranty, use:

 

Labor Operation

 

 

 

Description

 

 

 

Labor Time

 

 

 

J6353

 

 

Powertrain Control Module - Engine Reprogramming with SPS

 

 

0.4 hr

 

 

N6620

 

 

Power and Grounds Distribution Wiring and/or Connector Repair or Replacement

 

 

Use Published Labor Operation Time

 

 

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.

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WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION

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last one is a bulletin ,this is the code diagnoses

 

DTC P0191

 

Diagnostic Instructions

 

 

 

 

 

 

 

 

 

DTC Descriptor

DTC P0191 00: Fuel Rail Pressure (FRP) Sensor Performance

Diagnostic Fault Information

 

 

Circuit

 

 

 

Short to Ground

 

 

 

Open or High Resistance

 

 

 

Short to Voltage

 

 

 

Signal Performance

 

 

 

Fuel Rail Pressure (FRP) Sensor Signal

 

 

P0192 00

 

 

P0191 00, P0193 00

 

 

P0193 00

 

 

P0191 00

 

Circuit/System Description

 

The fuel pump flow control module (FPCM) monitors the voltage signal from the fuel pressure sensor. This DTC will set if the FPCM detects a stuck fuel pressure sensor signal.

Conditions for Running the DTC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Conditions for Setting the DTC

 

The FPCM does not detect a change in the FRP of at least 30 kPa (4.4 psi) over a predetermined variance of the engine speed.

Action Taken When the DTC Sets

 

 

 

 

 

 

Conditions for Clearing the DTC

 

 

 

 

 

 

Diagnostic Aids

 

 

 

 

 

 

Reference Information

 

 

Schematic Reference

 

Engine Controls Schematics

 

Connector End View Reference

 

Engine Controls Connector End Views

 

Description and Operation

 

Fuel System Description

 

Electrical Information Reference

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Scan Tool Reference

 

 

 

 

 

 

Circuit/System Verification

Important: Repair all other driveability DTCs or problems before performing this diagnostic.

 

Engine ON with the engine idling at normal operating temperature, the Fuel Rail Pressure Sensor parameter should read between 296.4 – 310.3 kPa (43 - 45 psi).

Circuit/System Testing

Important: Verify that the fuel tank is not empty. Only perform this diagnostic if there is at least 2 gallons of fuel in the fuel tank.

 

 

 

 

 

 

 

 

 

<a href="http://gsi.xw.gm.com/newsi/showDoc.do?docSyskey=1848848&cellId=162919&pubObjSyskey=3490998&from=sm&pubCellSyskey=877502&deliveryEffectiveDate=Nov+1%2C+2012#N66052">

Repair Instructions

 

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Fuel Pressure Sensor Replacement

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That's a short troubleshooting tree Rob, where's the rest of it? lol

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i know !!,,it doesnt come out rite here ,makes it real long lol

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Thanks for the info. I plugged in my code reader and read fuel pressure while driving. At cruising speed speeds it reads about 300kpa or around 44psi. With moderate acceleration it stats to fall off fast down to 40kpa or 5psi of course it its jerking and starving fuel at this time. I assume the sensor is reading correct due to engine stalling.

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Just change the fuel filter first. It is a cheap item that is supposed to be changed on a regular basis. It is not part of the fuel pump, not part of the fuel gauge, and not inside the fuel tank. It will create the exact things you are complaining about. It will take less time to change the filter than it takes to research what the codes mean.

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