Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Kia >> 2023 >> Niro Plug-In Hybrid EX >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (PHEV) (7 Of 9) >> 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 12V battery terminals and charge status.
  3. Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
    G15807153Courtesy of KIA MOTORS AMERICA, INC.

    Good 

    No Good