A8 Quattro Sedan V8-4.2L (BVJ) (2008)
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Check indication in display field - 3 -:
‹› Fuel pressure in fuel rail must sink to approximately 6 bar.
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Switch off ignition.
The fuel rail will continue to be filled with fuel, but it will no longer be under high pressure.
Now components or lines can be opened. Lay a clean cloth around the connection points and collect the escaping fuel.
Final procedures
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Reconnect electrical harness connectors.
Faults are saved in ECM when electrical connectors are disconnected:
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Connect Vehicle Diagnostic, Testing, and Information System (VAS 5051B).
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Start "Guided Functions" operating mode.
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Generate readiness code in ECM.