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Home › Hyundai › 2020 › Accent SE, Standard Trans › Repair and Diagnosis › Engine Performance › System › Engine Control System Diagnosis (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

Trouble Shooting Condition Possible Cause
Main Action
  • Circuit continuity check
  1. Poor connection
  2. Open or short power/ground in signal circuit
  3. S1
Prerequisite Condition
  • Internal resistance is greater than 950Ω
  • Internal resistance signal is same as Valid
Threshold Value
  • sensor voltage is between 2.3V and 2.7V
Diagnosis Time
  • Continuous
MIL
  • 2 Driving Cycle
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