Passat Wagon L4-2.0L Turbo (BPY) (2008)
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Switch the ignition on and off until the fuel pressure no longer increases.
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Check the indicated fuel pressure on the High pressure fuel gauge.
Specified value: 3.5 to 5.0 bar.
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Observe the pressure drop on the pressure gauge. Pressure must not fall below 3.0 bar within 10 minutes.
If pressure drops further:
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Immediately close the shut-off valve of High pressure fuel gauge.
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Observe the fuel pressure drop on the pressure gauge.
The fuel pressure must not fall below 3.0 bar within 10 minutes.
If the fuel pressure falls:
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The check-valve in the fuel pump is faulty, replace fuel pump.
If pressure does not fall:
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The pressure relief valve in the fuel filter malfunctioning, replace the fuel filter.
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Assembly is performed in the reverse of the removal.
Final Procedures
After the repair work, the following work steps must be performed in the following sequence:
1. Check the DTC memory. Refer to => [ Diagnostic Mode 03 - Read DTC Memory ] See: Computers and Control Systems/Testing and
Inspection/Scan Tool Testing and Procedures/Diagnostic Modes 01 - 09/Diagnostic Mode 03 - Read DTC Memory.
2. If necessary, erase the DTC memory. Refer to => [ Diagnostic Mode 04 - Erase DTC Memory ] See: Computers and Control Systems/Testing and
Inspection/Scan Tool Testing and Procedures/Diagnostic Modes 01 - 09/Diagnostic Mode 04 - Erase DTC Memory.
3. If the DTC memory was erased, generate readiness code. Refer to => [ Readiness Code ] See: Computers and Control Systems/Testing and
Inspection/Monitors, Trips, Drive Cycles and Readiness Codes/Readiness Code.
End of diagnosis.