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Home >> Hyundai >> 2023 >> Tucson Plug-In Hybrid Limited >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (PHEV) (7 Of 8) >> 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

Troubleshooting Condition Possible Cause
Main Action
  • Electrical inspection
  1. Poor contact of connector
  2. Open in signal circuit of O2 Sensor (Up)
  3. O2 Sensor (Up)
Prerequisite Condition
  • -
Threshold Value
  • Reference Voltage circuit open (O2 Sensor (Up))
Diagnostic Time
  • Continuously
MIL
  • 2nd Driving Cycle
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