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Home >> Kia >> 2005 >> Spectra EX, 2.0 1, Standard >> Repair and Diagnosis >> Engine Performance >> System >> DTC Troubleshooting Procedures - 2.0L >> Troubleshooting For DTC >> DTC P2251: Linear Ho2S Reference Ground Circuit/Open (Bank 1 Sensor 1) >> Inspection Procedure
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Inspection Procedure

  1. CHECK FOR OPEN IN HARNESS 
    1. Turn ignition switch to OFF position and disconnect HO2S and ECM connectors.
    2. Measure the resistance between terminal 2 of the HO2S harness connector and 53 of the ECM harness connector.
      1. Specifications: below 1Ω
        Fig 1: Check For Open In Harness
        G00719769Courtesy of KIA MOTORS AMERICA, INC.

    Is resistance within specification?

    1. Yes:  Go to next step.
    2. No: Repair open circuit in harness.
  2. CHECK HO2S AND ECM CONNECTORS 

    Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. See CONNECTOR INSPECTION PROCEDURE .

    Are all connectors good?

    1. Yes:  Proceed with ECM PROBLEM INSPECTION PROCEDURE .
    2. No: Repair or replace it.
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