LEMON Manuals: Even more car manuals for everyone
Home >> Hyundai >> 2015 >> Sonata Eco >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 125 (Engine Control System Diagnosis (1 Of 2) (HEV)) >> DTC P0139: O2 Sensor Circuit Slow Response (Bank 1/Sensor 2) >> System Inspection >> Visual/Physical Inspection

Visual/Physical Inspection

WARNING: This page is about a different variant/trim than selected.
  1. Visually/physically inspect the following items:
    • Check for corrosion on terminals
    • Check for terminal tension (at the HO2S and at the PCM)
    • Check for damaged wiring
    • Check the HO2S ground circuit for a good connection
    • Check front and rear HO2S for connections being reversed
  2. Was a problem found in any of the above areas?

    YES 

    NO 

    • Go to next step as below.