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Home › Hyundai › 2012 › Veloster Standard Trans › Repair and Diagnosis › Engine Performance › System › Engine Control System Diagnosis (2 Of 2) - Non-Turbo › DTC P2251: O2 Sensor Reference Ground Circuit Open (Bank 1 Sensor 1) › General Information › DTC Detecting Condition

General Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy
  • Circuit continuity check
  1. Poor connection
  2. Open or short power/ground in signal circuit
  3. S1
Enable Conditions
  • Sensor voltage: 1.47~1.53V
Threshold Value
  • Internal resistance > 950Ω
Diagnostic Time
  • 5 sec
MIL ON Condition
  • 2 Driving cycle
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