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Home >> Hyundai >> 2021 >> Elantra N Line, Standard Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 37 (Engine Control System Diagnosis - 2.0L (Except HEV) (6 Of 6)) >> DTC P2251-00: O2 Sensor Reference Ground Circuit/Open (Bank 1 Sensor 1) >> DTC Information And Inspection >> DTC Detecting Condition

DTC Information And Inspection: DTC Detecting Condition

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Item Detecting Condition Possible Cause
DTC Strategy
  • Electrical Monitoring
  1. Poor connector connection
  2. Open in virtual ground (Vg) circuit
  3. Front HO2S B1S1
Enable Condition
  • Sensor internal resistance more than 950Ω
  • Sensor pumping current valid state
Threshold Value
  • Sensor voltage is between 2.3 and 2.7V
Diagnostic Time
  • Immediately
MIL ON Condition
  • 2 driving cycles
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