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Home >> Hyundai >> 2018 >> Kona Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 146 (Engine Control System Diagnosis - 1.6L (1 Of 3)) >> DTC P0139-00: O2 Sensor Circuit Slow Response (Bank 1 / Sensor 2) >> DTC Information And Inspection >> DTC Detecting Condition

DTC Information And Inspection: DTC Detecting Condition

WARNING: This page is about a different car, the 2021 Hyundai Kona. However, it is still accessible from the selected car via links, so may be relevant.
TroubleShooting Condition Possible Cause
Main Action
  • Rationality check
  1. Poor connection
  2. B1S2
  3. ECM
Prerequisite
Condition
  • Battery voltage is higher than 10.7V
  • Engine speed is between 1200 RPM and 3520 RPM
  • EGT around downstream O2S is higher than 425°C (797°F)
  • Downstream O2S voltage before fuel cut is higher than 0.15V
  • Integrated Exhaust gas mass flow is higher than 0.2kg/h
  • Delta exhaust gas mass flow is between -150kg/h and 150kg/h
  • Fuel cut off
  • Downstream O2S voltage before fuel cut is higher than 0.63V
Threshold Value Case 1
  • Response Time is higher than 0.3 sec

    (Duration of Downstream O2S voltage from above 0.63V to 0.25V during fuel cut off)
Case 2
  • Transient Time is higher than Threshold

    (Duration of Downstream O2S voltage from 0.63V to 0.25V during fuel cut off)
Diagnostic Time
  • -
MIL
  • 2 Driving cycle
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