GTI L4-2.0L Turbo (BPY) (2007)
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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.
Final procedures
After the repair work, the following work steps must be performed in the following sequence:
1. Check the DTC memory. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Scan Tool Testing and
Procedures/Diagnostic Mode 03: Interrogating Fault Memory
2. If necessary, erase the DTC memory. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Scan Tool Testing and
Procedures/Diagnostic Mode 04: Reset/Delete Diagnostic Data
3. If the DTC memory was erased, generate readiness code.
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End of diagnosis.