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Home >> Chevrolet >> 2002 >> Impala Base, 3.4 E >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Self-Diagnostics - 3.4L >> Diagnostic Tests >> DTC P0440: EVAP System >> Test Description

Test Description

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

  1. 4

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

  2. 6

    This step verifies proper operation of the FTP sensor.

  3. 9

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