Checking fuel tank pressure sensor

WARNING: This page is about a different car, the 2002 Volvo C70, 2001 Volvo C70, 2000 Volvo C70, 1999 Volvo C70, and 1998 Volvo C70. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Engine Start Verification

Courtesy of VOLVO CARS OF NORTH AMERICA.

Start the engine and let it idle.
When the canister purge (CP) valve opens the pressure in the fuel tank should drop.

Fig 2: Identifying Scan Tool
Courtesy of VOLVO CARS OF NORTH AMERICA.
- Go into the scrolling values list and read off the value of the fuel tank pressure and canister purge (CP) valve.

Does the fuel tank pressure drop?

YES
Refer to Test pressurization of the fuel tank system
NO
Refer to Checking fuel tank pressure sensor hose