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Home >> Hyundai >> 2004 >> Elantra GLS, Standard >> Repair and Diagnosis >> Engine Mechanical >> Fuel System >> DTC Trouble Shooting Procedures >> DTC P0131: O2 Sensor Circuit Low Input (Bank 1, Sensor 1) >> Inspection Procedures >> 1. Check For Short To Ground In Harness
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1. Check For Short To Ground In Harness

  1. Turn ignition switch to OFF position and disconnect HO2S and ECM connectors.
  2. Measure resistance between terminal 1 of the HO2S harness connector and chassis ground.
  3. Measure resistance between terminal 2 of the HO2S harness connector and chassis ground.
  4. Measure resistance between terminal 3 of the HO2S harness connector and chassis ground.
  5. Measure resistance between terminal 4 of the HO2S harness connector and chassis ground.
    Fig 1: Checking HO2S Harness For Short To Ground
    G00749221Courtesy of HYUNDAI MOTOR CO.
    • Specifications : infinite 

Does each resistance indicate open? 

Yes: Go to next step.

No: Repair short to chassis ground in harness.

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