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Home >> Hyundai >> 2025 >> Kona Limited, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis - 1.6 (2 Of 2) >> 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

Troubleshooting Condition Possible Cause
Main Action
  • Open in circuit
  1. Poor contact of connector
  2. Open in signal circuit of O2 Sensor (Up)
  3. O2 Sensor (Up)
Prerequisite Condition
  • Internal resistance higher than 950Ω
  • Internal resistance signal is valid
Threshold Value
  • Sensor voltage is between 2.3 and 2.7V
Diagnostic Time
  • 5s
MIL
  • 2 driving cycles
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