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Home >> Hyundai >> 2009 >> Tucson GLS, Standard >> Repair and Diagnosis >> Engine Performance >> System >> DTC Troubleshooting Procedures (2.0L) >> Troubleshooting for DTC >> P0131 O2 Sensor Circuit Low Input (Bank 1/Sensor 1) >> DTC Detecting Condition
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P0131 O2 Sensor Circuit Low Input (Bank 1/Sensor 1): DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy
  • Voltage Range check
  • Short to ground in signal harness
  • Contact resistance in connectors.
  • Faulty Heated O2 Sensor (HO2S).
Enable Conditions
  • Lambda regulation on Maximum Limit (50%)
  • Canister Purge valve closed
  • Battery voltage > 10V
  • No relevant failure
Threshold Value
  • Sensor voltage < 0,02 V and resistance < 30 Ω
Diagnostic Time
  • 60 sec.
Fail Safe
  • Reset lambda adaptation and fuel trim adaptation.
  • Front HO2S heater is controlled in open loop control.
  • EVAP. Emission control function is controlled in minimum operation mode.
Mil On Condition
  • 2 Driving Cycles
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