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Home >> Chevrolet >> 2001 >> Venture Base, Van Passenger >> Repair and Diagnosis >> External Pages >> Different car >> Section 158 (Engine Controls Self-Diagnostics - 2.2L) >> Diagnostic Tests >> DTC P0440: Evaporative Emission System >> Test Description

Test Description

WARNING: This page is about a different car, the 2003 Pontiac Sunfire, 2003 Pontiac Grand Am, 2003 Oldsmobile Alero, and 2003 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.

The number below refer to the step number on the diagnostic procedure.

  1. 3  - This test verifies that the EVAP purge valve is electrically functional.
  2. 4  - This test verifies that the EVAP vent valve is electrically functional.
  3. 9  - 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.
  4. 11  - This test verifies that the FTP sensor is accurate. An FTP sensor that does not correctly respond to vacuum, or pressure may cause this DTC to set.

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