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Home › Hyundai › 2021 › Ioniq Plug-In Hybrid SEL › 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

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 Case1
  • The average slope signal is lower than 1500 mV/s (Fuel cut during deceleration)
Case2
  • 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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