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Home >> Chevrolet >> 2001 >> Cavalier LS, 2.2 4 >> Repair and Diagnosis >> External Pages >> Different car >> Section 36 (Engine Controls Self-Diagnostics - 2.4L) >> Diagnostic Tests >> DTC P0440: EVAP System >> Test Description

Test Description

WARNING: This page is about a different car, the 2002 Pontiac Sunfire and 2002 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.

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

  1. 4

    This test verifies that the EVAP purge valve is electrically functional.

  2. 5

    This test verifies that the EVAP vent valve is electrically functional.

  3. 10

    This test verifies that engine vacuum is present when the EVAP purge valve is open.

  4. 12

    This test verifies that the FTP sensor is accurate. An EVAP FTP sensor that does not correctly respond to vacuum or pressure may cause this DTC to set.
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