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Home >> Hyundai >> 2021 >> Veloster N Standard Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (3 Of 3) >> DTC P2251-00: O2 Sensor Reference Ground Circuit/Open (Bank 1 Sensor 1) >> DTC Information And Inspection >> DTC Detecting Condition
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DTC Information And Inspection: DTC Detecting Condition

Item Detecting Condition Possible Cause
Main Action
  • Electrical check
  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 10V and 16V
Threshold Value
  • Reference virtual ground (Vg) circuit is open.
Diagnostic Time
  • Continuously
MIL On Condition
  • 3rd Driving Cycle
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