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Home >> Kia >> 2015 >> K900 V8 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis - 5.0L (2 Of 5) >> DTC P0159: O2 Sensor Circuit Slow Response (Bank 2/Sensor 2) >> DTC Information >> DTC Detecting Condition

DTC Information: DTC Detecting Condition

Item Detecting Condition Possible cause
DTC Strategy
  • Rationality check
  1. Poor connector connection
  2. Air leak in intake or exhaust system
  3. Defected fuel system
  4. Defected upstream O2 sensor
  5. Defected ECM
General Enable Conditions
  • Downstream O2 sensor voltage before fuel cut is higher than 0.15V
  • Fuel cut "OFF"
  • Exhaust gas temperature around upstream O2 sensor is higher than 752°F(400°C)
  • Exhaust gas mass flow is higher than 22 kg/h
  • Battery voltage is higher than 10.7V
  • Engine speed is at between 1200rpm and 3520rpm.
Threshold Value Case 1
  • Response time is over 5.0 sec.

    (Duration of downstream O2 sensor voltage from above 0.55V to 0.15V during fuel cut off)
Case 2
  • Transient time is over 0.35 sec.

    (Duration of downstream O2 sensor voltage from 0.4V to 0.2V during fuel cut off)
Diagnostic Time
  • -
Mil On Condition
  • 2 driving cycles
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