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Home >> Genesis >> 2021 >> G70 3.3T, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis - 3.3L (3 Of 9) >> DTC P0159-00: O2 Sensor Circuit Slow Response (Bank 2 Sensor 2) >> Component Inspection >> Check HO2S
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Check HO2S

  1. Replace the O2 sensor.
  2. Clear the DTC using GDS.
  3. Warm up the engine to normal operating temperature and let it idle until the radiator fan is working.
  4. Drive the vehicle to steady stage around 72-88 km/h (45-55 mph) for 120 seconds.
  5. Stop the vehicle and keep the engine idling.
  6. Check if O2 sensor monitoring readiness is complete.
  7. Does the GDS show DTC P015900?

    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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