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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 362 (Engine Controls Self-Diagnostics) >> Diagnostic Tests >> DTC P0442: EVAP System - Small Leak >> Test Description

Test Description

WARNING: This page is about a different car, the 2003 Pontiac Aztek and 2003 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step number in the diagnostic procedures.

  1. 2 -  This step verifies that a failure condition is present.
  2. 4 -  Introducing smoke in 15 second intervals may allow smaller leak areas to be more noticeable. When system is less pressurized, smoke will sometimes escape in a more condensed manner.
  3. 6 -  This step verifies that repairs are complete and that there are no other leaks in the system.

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