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Home >> Hyundai >> 2017 >> Sonata Base >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 39 (Engine Control System Diagnosis - 1.6L (2 Of 3) (Except HEV)) >> DTC P0442: Evaporative Emission System-Leak Detected (Small Leak) >> System Inspection

System Inspection

WARNING: This page is about a different variant/trim than selected.
  1. Check Fuel Filler Cap
    1. Check the Fuel Filler Cap is installed and properly tightened.
    2. Check if the Fuel Filler Cap seal is missing or damaged.
    3. Is the Fuel Filler Cap OK?

      YES 

      • Go to "Check vapor hoses for leakage in fuel system" procedure below.

      NO 

  2. Check vapor hoses for leakage in fuel system
    1. Check vapor hoses between the following components for leakage:
      • Intake manifold ~ Purge control solenoid valve (PCSV)
      • Purge control solenoid valve (PCSV) ~ Canister
      • Canister ~ Canister close valve (CCV)
      • Canister ~ fuel tank
    2. Does a leak exist?

      YES 

      NO 

      • Go to "Check fuel filler pipe for crack or leakage" procedure below.
  3. Check fuel filler pipe for crack or leakage
    1. Check that there is crack or leakage in fuel filler pipe
    2. Is there any crack or leakage?

      YES 

      NO