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Home >> GMC >> 2002 >> Jimmy 2D Utility, Part Time, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls Self-Diagnostics - 4.3L >> Diagnostic Tests >> DTC P0440: EVAP System - Large Leak >> Test Description

Test Description

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

  1. 4

    This step verifies that a failure condition is active.
  2. 5

    This step is used to verify if a leak is present.
  3. 6

    This step verifies proper operation of the FTP sensor.
  4. 9

    This step tests the EVAP canister purge valve for a restriction or blockage.