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Home >> Hyundai >> 2017 >> Sonata Base >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 32 (Engine Control System Diagnosis - 2.0L (1 Of 3) (Except HEV)) >> DTC P0140: O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 2) >> DTC Information >> DTC Detecting Condition

DTC Information: DTC Detecting Condition

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Item Detecting Condition Possible Cause
DTC Strategy
  • Signal plausibility with lean mixture (during fuel cut-off)
  1. Poor connection or damaged harness
  2. HO2S contamination
Enable Conditions
  • O2 Sensor operative readiness
  • O2 Sensor preheating and full heating phases finished
  • Battery voltage between 11 V and 16 V
  • Integrated mass air flow since last fuel cut off greater than 500g
  • Downstream O2 sensor readiness detected
  • Catalyst temperature model higher than 400°C (752°F)
  • Exhaust gas temperature model at sensor location higher than 400°C (752°F)
Threshold Value
  • Downstream HO2S greater than 0.2 V during fuel cut-off phase
Diagnostic Time
  • 5 sec.
Mil On Condition
  • 2 Driving Cycles
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