Volkswagen Workshop Manuals
Passat Sedan V6-3.6L (BLV) (2008)
Powertrain Management > Fuel Delivery and Air Induction > Fuel Tank > Fuel Gauge Sender > Component Information > Service Precautions > Page 3590
Fuel Gauge Sender: Service and Repair
High Side Pressure, Releasing
Before opening the high pressure side, for example to remove the fuel pressure sensor (G247), the fuel pressure must be reduced to a
Reposition the coolant hose on the intake manifold to the side and unclip the wiring harness below from its retaining clip.
Disconnect the connector from the fuel pressure regulator valve (N276) on the high pressure pump - arrow -.
Allow the engine to idle approximately 10 seconds.
‹› When the fuel pressure regulator valve electrical connector is disconnected during idle, the pressure in the high side decreases to approximately 6
‹› After the high side pressure has been reduced, the high side must be opened immediately. Otherwise, the pressure increases again due to the
warming of the fuel.
Turn off the ignition.
Place a clean cloth around the connection point and carefully open in order to release the residual pressure to approximately 6 bar. Leaking fuel
After completing the work, check the Engine Control Module (ECM) Diagnostic Trouble Code (DTC) memory. Erase all DTC entries which may
‹› If the DTC memory was erased, the readiness code must be generated again, refer to "Guided Fault Finding" in the vehicle diagnostic tester.
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