Checking the fuel tank pressure sensor

Fig 1: Engine Start Verification

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Disconnect tool 9995646 .
• Connect the EVAP canister hose.
• Remove the hose clamp from the hose between the canister purge (CP) valve and the intake manifold.
• Start the engine and let it run at idle speed.
• Read off the value for the fuel tank pressure and the canister purge (CP) valve.

  When the canister purge (CP) valve opens, the pressure in the fuel tank must drop.

  Fig 2: Identifying VCT2000 Diagnostic Tool Symbol In VIDA

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Has the pressure in the fuel tank dropped? 

• YES 

  Refer to Checking the hose to the EVAP canister shut-off valve 

• NO 

  Refer to Checking the fuel tank pressure sensor hose