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Home >> Genesis >> 2021 >> G90 5.0 Ultimate, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 22 (Engine Control System Diagnosis - 3.3L (1 Of 9)) >> DTC P0056-00: HO2S Heater Control Circuit (Bank 2/Sensor 2) >> DTC Information >> DTC Detecting Condition

DTC Information: DTC Detecting Condition

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Item Detecting Condition Possible Cause
DTC Strategy
  • Monitor the current through the heater
  1. Related fuse blown or missing
  2. Heater control circuit open or short
  3. Power supply circuit open or short
  4. Poor connection or damaged harness
  5. Faulty HO2S
Enable Conditions
  • Downstream O2 sensor normal heating time is more than 58 seconds
  • ECT drop since the last engine stop is greater than 24.8°C (70.64°)
  • Battery voltage is between 11V and 16V
  • Downstream O2 sensor internal resistance is less than 22.5 kΩ
Threshold Value
  • HO2S internal resistance is greater than 1 kΩ
Diagnosis Time
  • 10 seconds
MIL On Condition
  • 2 driving cycles