New Beetle L4-1.8L Turbo (AWV) (2005)
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Open shut-off valve of pressure gauge. The lever points in the direction of flow (arrow).
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Start engine and let run at idle.
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Wait until pressure has built up, and then switch off ignition. Simultaneously pinch return hose tightly together.
If pressure does not drop:
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Replace fuel pressure regulator.
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Erase DTC memory of Engine Control Module (ECM). Diagnostic mode 4: Reset/erase diagnostic data. See: Computers and Control
Systems/Testing and Inspection/Scan Tool Testing and Procedures/With Generic Scan Tool/Diagnostic Mode 4: Reset/Erase Diagnostic Data
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Generate readiness code. See: Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
If pressure drops again:
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Check whether line connections, O-rings in fuel rail, and fuel injectors are properly sealed.
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Check pressure gauge for proper seal.
NOTE: Before removing pressure gauge, remove fuse no. 28 again and put cleaning rags back around line connection which is to be
disconnected.
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Erase DTC memory of Engine Control Module (ECM). Diagnostic mode 4: Reset/erase diagnostic data. See: Computers and Control
Systems/Testing and Inspection/Scan Tool Testing and Procedures/With Generic Scan Tool/Diagnostic Mode 4: Reset/Erase Diagnostic Data
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Generate readiness code. See: Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes