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Home >> Hyundai >> 2023 >> Elantra N Standard Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (2 Of 6) >> DTC P0140-00: O2 Sensor Circuit No Activity Detected (Bank 1/Sensor 2) >> DTC Information and Inspection >> DTC Detecting Condition

DTC Information and Inspection: DTC Detecting Condition

Troubleshooting Condition Possible Cause
Main Action
  • Rationality check
  1. Poor contact of connector
  2. Leak in intake or exhaust system
  3. O2 Sensor (Down)
Prerequisite Condition
  • O2 Sensor (Down) is ready to run
  • O2 Sensor (Down) is pre-heated
  • Battery voltage is between 11V and 16V
  • Cumulative volume of air flow is greater than 500g after fuel cut is released
Threshold Value
  • Voltage of the O2 Sensor (Down) signal is greater than 0.2V
Diagnostic Time
  • 2.5 sec
MIL
  • 2nd driving cycles
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