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Home >> Hyundai >> 2021 >> Ioniq Plug-In Hybrid SEL >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (PHEV) (2 Of 3) >> DTC P0490: Exhaust Gas Recirculation Control Circuit High >> Component Inspection

Component Inspection

  1. IG "OFF" & Disconnect EGR valve.
  2. Check that EGR valve is contaminated or damaged by foreign materials.
  3. Substitute with a known - good EGR valve and check for proper operation.
  4. Is the signal normal?

    YES 

    NO 

    • Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage. So, check poor connections and the related circuit between ECM and component thoroughly. Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
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