LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Kia >> 2016 >> Forte LX, Automatic Trans >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System Diagnosis - 1.8L (1 Of 3) >> DTC P0133: O2 Sensor Circuit Slow Response (Bank 1/Sensor 1) >> System Inspection
April 5, 2026: LEMON Manuals is launched! Read the announcement.

System Inspection

■ Air Leakage Inspection 

  1. Visually/physically inspect the following conditions:
    • Vacuum hoses for splits, kinks and improper connections.
    • Exhaust system between HO2S and Three way catalyst for air leakage.
    • EVAP system for leakage
    • PCV hose for proper installation
  2. Was a problem found in any of the above areas?

    YES 

    NO 

    • Go to next step as below.

■ Visual/Physical Inspection 

  1. Visually/physically inspect the following conditions:
    • Ensure that the HO2S is securely installed.
    • Check for corrosion on terminals
    • Check for terminal tension (at the HO2S and at the PCM/ECM)
    • Check for damaged wiring
    • Check the HO2S ground circuit for a good connection
  2. Was a problem found in any of the above areas?

    YES 

    NO 

    • Go to next step as below.