LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 401 (Engine Controls - Self Diagnostics - 8.1L) >> Diagnostic Tests >> DTC P0455: EVAP System Leak Detected - Gross Leak/No Flow >> Test Description

Test Description

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2003 GMC Yukon XL, 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Suburban, and 2003 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The number below refers to the step number in the diagnostic procedure.

  1. 3

    Introducing smoke in 15 second intervals may allow smaller leak areas to be more noticeable. When the system is less pressurized, the smoke will sometimes escape in a more condensed manner.

  2. 5

    This step verifies proper operation of the Fuel Tank Pressure (FTP) sensor.

  3. 6

    A normal operating FTP sensor should increase above 5 inches of H2O and stop between 6 and 7 inches of H2O.

scientia non olet · About LEMON Manuals