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Home >> Suzuki >> 2007 >> SX4 Base, Standard >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine General Information And Diagnosis >> Diagnostic Information and Procedures >> DTC P0037 / P0038: HO2S Heater Control Circuit Low / High (Sensor-2, Bank-1) >> DTC Detecting Condition and Trouble Area
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DTC Detecting Condition and Trouble Area

DTC DETECTING CONDITION AND TROUBLE AREA

DTC detecting condition Trouble area
P0037: 
HO2S circuit voltage is lower than specification for specified time even though control duty ratio of HO2S heater is less than 75% with engine running. (Heater control duty pulse is not detected in its monitor signal) (2 driving cycle detection logic)
P0038: 
HO2S circuit voltage is higher than specification for specified time even though control duty ratio of HO2S heater is more than 25% with engine running. (Heater control duty pulse is not detected in its monitor signal) (2 driving cycle detection logic)
  • HO2S heater and/or its circuit
  • ECM