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I have a 2008 Saturn Vue. Has code P0641. Is there a common…

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I have a 2008 Saturn...
I have a 2008 Saturn Vue. Has code P0641. Is there a common problem? What path should I take?
Submitted: 3 months ago.Category: Saturn
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Answered in 17 minutes by:
3/30/2018
Saturn Mechanic: Eric, Automotive Repair Shop Manager replied 3 months ago
Eric
Eric, Automotive Repair Shop Manager
Category: Saturn
Satisfied Customers: 34,897
Experience: 20+ yrs. experience as repair shop manager and technician.
Verified

HI,

It will either be the fuel pressure sensor or the fuel pump control module. Do the following test to determine which

FPCM
DTC P0641 or P06A6 (FPCM)

Diagnostic Instructions

* Perform theDiagnostic System Check - Vehicle (See: Vehicle > Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* ReviewStrategy Based Diagnosis (See: Vehicle > Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Vehicle > Initial Inspection and Diagnostic Overview)provides an overview of each diagnostic category.

DTC Descriptor
DTC P0641 00
- 5 Volt Reference Circuit

DTC P06A6 00
- 5 Volt Reference Circuit Performance

Diagnostic Fault Information

image

Circuit/System Description

The fuel pump control module (FPCM) monitors the voltage signal from the fuel pressure sensor. These DTCs will set if the FPCM detects that the FRP sensor voltage is out of range.

Conditions for Running the DTC

The engine is running.

Conditions for Setting the DTC

* The FPCM detects that the FRP 5 volt reference is above or below a predetermined voltage threshold.
* The above condition is present for greater than 10 seconds.

Action Taken When the DTC Sets

DTC P0641 and P06A6 are A type DTCs.

Conditions for Clearing the DTC

DTC P0641 and P06A6 are A type DTCs.

Diagnostic Aids

Using the Failure Records data may help locate an intermittent condition. If you cannot duplicate the DTC, the information in the Failure Records can help determine how many miles since the DTC set. The Fail Counter and Pass Counter can help determine how many ignition cycles that the diagnostic test reported a pass and/or a fail.

Reference Information
Schematic Reference

Engine Controls Schematics (See: Powertrain Management > Electrical)
Connector End View Reference

Component Connector End Views (See: Vehicle > Connector Views)
Description and Operation

Fuel System Description (See: Computers and Control Systems > Components > Fuel System Description)
Electrical Information Reference

* Circuit Testing (See: Vehicle > Component Tests and General Diagnostics)
* Connector Repairs (See: Vehicle > Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (See: Vehicle > Component Tests and General Diagnostics)
* Wiring Repairs (See: Vehicle > Component Tests and General Diagnostics)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: A L L Diagnostic Trouble Codes ( DTC ) > Diagnostic Trouble Code Descriptions)
Scan Tool Reference

Control Module References (See: Vehicle > Programming and Relearning)for scan tool information

Circuit/System Testing

1. Ignition OFF, disconnect harness connector of the fuel line pressure sensor.
2. Ignition OFF, test for less than 1.0 ohm of resistance between the low reference circuit terminal 2 and ground.

♦ If greater than the specified range, replace the FPCM.

3. Ignition ON, test for 4.8-5.2 volts between the 5 volt reference circuit terminal 3 and ground.

♦ If out of the specified range, replace the FPCM.

4. If all circuits test normal, replace the fuel pressure sensor.

Wiring diagram is attached

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Customer reply replied 3 months ago
Is the fuel pressure sensor under the abs unit in the front?
Saturn Mechanic: Eric, Automotive Repair Shop Manager replied 3 months ago

That is the approximate location. you get to it from underneath the vehicle - see attached

If for any reason, you can't rate my answer OKAY, GOOD, or EXCELLENT/3 STARS OR HIGHER today. Please reply and let me know why, so I can help more/better. All follow up responses are FREE, after completing the required rating
Please remember to rate service using the separate rating page. Thank you

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Customer reply replied 3 months ago
How can I tell if the code is on the fuel pressure sensor side or the cam sensor side?
Saturn Mechanic: Eric, Automotive Repair Shop Manager replied 3 months ago

Should also have either a P0365 or P340 if on the cam sensor side

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Saturn Mechanic: Eric, Automotive Repair Shop Manager replied 3 months ago

Those would be in addition to the P0641

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