GTI L4-2.0L Turbo (BPY) (2007)
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Connect a High pressure fuel gauge between the fuel filter and the fuel supply line.
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Open the shut-off valve of the High pressure fuel gauge.
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Start the engine and let it run at idle.
CAUTION: Shut-off valve must only be closed slowly. At a fuel pressure of 8 bar, shut-off valve must be opened again immediately to
prevent damage to pressure measuring device.
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Slowly close the shut-off valve of the High pressure fuel gauge. Pressure must increase to min. 6.0 bar. If 6 bar is reached, open shut-off valve
again immediately.
If the fuel pressure increases:
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The pressure relief valve in the fuel filter malfunctioning, replace the fuel filter.
If the fuel pressure does not increase:
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Replace the fuel pump.
Final procedures
After the repair work, the following work steps must be performed in the following sequence:
1. Check the DTC memory. See: 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: 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.