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Home >> Kia >> 2023 >> Carnival EX >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (6 Of 8) >> DTC P2251-00: O2 Sensor Reference Ground Circuit/Open (Bank 1 Sensor 1) >> Wiring Inspection >> Basic Inspection >> Inspection Procedure

Inspection Procedure

  1. Check related fuse(s) or relay(s).
  2. Check battery terminals and charge status.
  3. Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.

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