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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 83 (Engine Controls Self-Diagnostics - 2.2L) >> Diagnostic Tests >> DTC P1441: EVAP System Flow During Non-Purge >> Test Description

Test Description

WARNING: This page is about a different car, the 2002 GMC Sonoma and 2002 Chevrolet S10 Pickup. However, it is still accessible from the selected car via links, so may be relevant.

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

  1. 3

    Removing the fuel fill cap will equalize the pressure inside the tank with atmospheric pressure. At 0 inches of H2O, the FTP sensor should be near 1.5 volts. If FTP is not, there is a concern with the sensor or related wiring.

  2. 4

    This step checks for a leaking purge valve.
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