Fuel Tank Leak Test: Description
WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
The fuel tank leak test is used to locate any fuel or fuel vapor escaping the fuel tank area. Fuel vapors escaping above the fuel level will be detected when the evaporative emission (EVAP) diagnostics completes one test cycle. The malfunction indicator lamp (MIL) will illuminate after the EVAP diagnostics completes two test cycles.