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Home >> Hyundai >> 2017 >> Sonata Base >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 34 (Engine Control System Diagnosis - 1.6L (1 Of 3) (Except HEV)) >> DTC P0139: O2 Sensor Circuit Slow Response (Bank 1/Sensor 2) >> Component Inspection

Component Inspection

WARNING: This page is about a different variant/trim than selected.
  1. Replace the HO2S.
  2. Clear DTC with GDS.
  3. Start the engine and warm it up until the radiator fan comes on (more than at least 10 minutes).
  4. Drive at a steady speed between 45-55 mph (72-88 km/h) for 120 sec.
  5. Stop and then maintain idle state.
  6. Check if O2 sensor monitoring readiness is complete.
  7. Does the GDS show DTC P0133?

    YES 

    • Substitute with a known - good ECM and check for proper operation. If the problem is corrected, replace ECM and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

    NO 

    • Troubleshooting is finished.
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