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Home >> Genesis >> 2019 >> G70 2.0T Dynamic, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis - 2.0L (4 Of 4) >> DTC P2251-00: O2 Sensor Reference Ground Circuit/Open (Bank 1 Sensor 1) >> DTC Information >> DTC Detecting Condition
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DTC Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
Main Action
  • Electrical check - Lambda sensor reference ground circuit
  1. Poor connection or damaged harness
  2. Open in HO2S control circuit
  3. Front HO2S
Prerequisite condition
  • Upstream O2 sensor operative readiness is detected.
  • Battery voltage is between 11V and 16V.
Threshold Value
  • Sensor reference ground circuit (Vg) is open.
Diagnosis Time
  • 2.5 Seconds
Mil On Condition
  • 3rd Driving Cycle
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