LEMON Manuals: Even more car manuals for everyone
Home >> Kia >> 2017 >> Optima Plug-In Hybrid EX >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (2 Of 3) (PHEV) >> DTC P0420-00: Catalyst System Efficiency Below Threshold (Bank 1) >> System Inspection >> Exhaust System For Restriction Or Leakage

Exhaust System For Restriction Or Leakage

  1. Refer to INTAKE AND EXHAUST SYSTEM (PHEV) and visually and/or physically inspect following conditions;
    • Exhaust System between O2 Sensor and Three-Way Catalyst Converter for air leakage, restriction and damage.
    • Damage and for loose or missing hardware
  2. Has any problems been found?

    YES 

    NO 

    • Go to "Three-Way Catalyst Converter Inspection" procedure below.