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Home >> Hyundai >> 2019 >> Ioniq Plug-In Hybrid >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (PHEV) (1 Of 3) >> DTC P0139: O2 Sensor Circuit Slow Response (Bank 1/Sensor 2) >> DTC Information >> DTC Detecting Condition
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DTC Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy
  • Rationality check
  1. Poor connection
  2. B1S2
  3. ECM
Enable Conditions
  • -
Threshold Value Case 1
  • The average slope signal is lower than 1500 mV/s

    (Fuel cut during deceleration)
Case 2
  • The average slope signal is lower than 1500 mV/s

    (After the voltage gradient created by the rich to add fuel after the end of the deceleration fuel cut-off)
Diagnostic Time
  • -
MIL ON Condition
  • 2 driving cycle
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