LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Hyundai >> 2004 >> Accent Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (1 Of 2) >> DTC Troubleshooting Procedures >> DTC P0031: O2 Sensor Heater Circuit Low (Bank 1, Sensor 1) >> DTC Detecting Condition >> 1.6 DOHC
April 5, 2026: LEMON Manuals is launched! Read the announcement.

1.6 DOHC

1.6 DOHC DETECTING CONDITION

Item Detecting Condition Possible cause
Monitoring Strategy
  • Heater check, low
  • Open in battery and control circuit
  • Short to ground in control circuit (pin 48 to 36)
  • Faulty HO2S heater
  • Faulty PCM
Threshold value  
Enable Conditions
  • Open or short circuit
Diagnostic Time
  • Continuous
Fail Safe
  • Heater open loop control
scientia non olet · About LEMON Manuals