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Home >> Hyundai >> 2017 >> Sonata Base >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 32 (Engine Control System Diagnosis - 2.0L (1 Of 3) (Except HEV)) >> DTC P016B: Closed Loop Air/Fuel Ratio Control At Limit-System Too Rich >> Component Inspection

Component Inspection

WARNING: This page is about a different variant/trim than selected.

■ PCV Inspection 

  1. IG "OFF". Remove PCV valve from rocker cover.
  2. Insert a thin tool into the PCV valve from the threaded side and verify that the plunger is moving.
  3. Is the PCV valve moving correctly?

    YES 

    • Go to "Injector Operation Inspection" as follows.

    NO 

■ Injector Operation Inspection 

  1. Start engine.
  2. Check that RPM decrease when performing the injector's "Actuation Test".
    NOTE: The purpose of this test is to determine if there is a fault in fuel injection. Start this test in stable idle to get an accurate result.
    Fig 1: Screen Display - Injector Actuation Test
    G11992422Courtesy of HYUNDAI MOTOR AMERICA
  3. Is there any cylinder with no change in RPM or only a small change in RPM?

    YES 

    • Check injector for contamination, deterioration, or damage. Substitute with a known-good injector and check for proper operation. If the problem is corrected, replace injector and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.

    NO