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Home >> Hyundai >> 2004 >> Accent Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> Engine Control System Diagnosis (1 Of 2) >> DTC Troubleshooting Procedures >> DTC P0030: O2 Sensor Heater Control Circuit (Bank 1/Sensor 1) >> DTC Detecting Condition >> 1.5 SOHC
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1.5 SOHC

1.5 SOHC DETECTING CONDITION

Item Detecting Condition Possible cause
Monitoring Strategy
  • Heater current check
  • Contaminated, deteriorated or aged HO2S
  • Heater resistance out of reasonable range
  • Faulty HO2S heater
  • Faulty PCM
  • Misplaced, bent, loose or corroded terminals
Threshold value
  • Internal resistance > threshold (exh. temp., heater power)
Enable Conditions
  • Exhaust gas temperature (model) 320-800°C (608°F~1472°F)
  • Dew point end detected Battery voltage 10.7-15.6V
Diagnostic Time
  • Continuous
Fail Safe
  • Heater open loop control
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