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Home >> Hyundai >> 2004 >> Accent GL, 2D Hatchback, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (1 Of 2) >> DTC Troubleshooting Procedures >> DTC P0030: O2 Sensor Heater Control Circuit (Bank 1/Sensor 1) >> Component Inspection
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Component Inspection

  1. Check HO2S heater
    1. Measure resistance between terminal 3 and 4 of sensor connector (To sensor side)

      Specification: 176°C: 8.0~14.0Ω

      Fig 1: Measuring Resistance Between Terminal 3 And 4 Of Sensor Connector
      G03851674Courtesy of HYUNDAI MOTOR CO.
    2. Is measure resistance within Specification?

      YES 

      • Substitute with a known good PCM and check for proper operation. If the problem is corrected, replace PCM and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.

      NO 

      • Substitute with a known-good HO2S heater and check for proper operation. If the problem is corrected, replace HO2S heater and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
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