DTC P0641 or P06A6 (Fuel Pump Control Module)
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DTC P0641 or P06A6 (Fuel Pump Control Module)
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DTC P0641
5 V Reference Circuit
DTC P06A6
5 V Reference Performance
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Diagnostic Fault Information
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Circuit
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Short to Ground
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Open/High Resistance
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Short to Voltage
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Signal Performance
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5 V Reference
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P0641
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P0641, P06A6
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P0641
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P06A6
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Signal
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P018C
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P018B, P018C
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P018D
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P018B
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Low Reference
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-
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P0641, P06A6
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-
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P06A6
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Circuit/System Description
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The fuel pressure sensor is located on the fuel line. The fuel pressure sensor monitors the fuel pressure in the fuel line. The fuel pump control module monitors the voltage signal from the fuel pressure sensor.
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Conditions for Running the DTC
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The ignition is ON.
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Conditions for Setting the DTC
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The fuel pump control module detects that the fuel pressure 5 V reference is above or below a predetermined voltage threshold.
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Action Taken When the DTC Sets
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DTCs P0641 and P06A6 are Type A DTCs.
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Conditions for Clearing the DTC
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DTCs P0641 and P06A6 are Type A DTCs.
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.
Schematic Reference
Engine Controls Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Fuel System Description
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References
for scan tool information
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1.
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Ignition OFF, disconnect the harness connector at the B47 fuel pressure sensor.
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2.
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Ignition OFF, test for less than 1.0 Ω between the low reference circuit terminal 2 and ground.
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3.
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If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K27 Fuel Pump Control Module.
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4.
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Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal 3 and ground.
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5.
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If less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K27 Fuel Pump Control Module.
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6.
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If greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the K27 Fuel Pump Control Module.
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7.
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If all circuits test normal, replace the B47 fuel pressure sensor.
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Perform the
Diagnostic Repair Verification
after completing the diagnostic procedure.
