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Home >> Hyundai >> 2021 >> Veloster Turbo >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> 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
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DTC Information and Inspection: DTC Detecting Condition

Trouble Shooting 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 1200rpm and 3520rpm
  • EGT around downstream O2S is higher than 425°C (797° F)
  • Downstream O2S voltage before fuel cut is higher than 0.15V
  • Intergrated 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 Case1
  • Response Time is higher than 0.3 sec

    (Duration of Downstream O2S voltage from above 0.63V to 0.25V during fuel cut off)
Case2
  • 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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