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Home >> Hyundai >> 2003 >> Elantra GLS, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0137: Ho2S Circuit Low Input (Bank 1/Sensor 2) >> General Information >> DTC Detecting Condition
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General Information: DTC Detecting Condition

DTC DETECTING CONDITION AND POSSIBLE CAUSES

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 Condition
  • Catalyst temperature model > 350°C (662°F)
  • Lambda regulation active
  • Lambda controller is not on the limit
  • Catalyst purge after fuel cut off is not active
  • No relevant failure
  • 10V < Battery voltage < 16V
Threshold Value
  • Downstream O2 Sensor voltage < 0.02V & sensor element resistance < 30Ω
Diagnostic Time
  • 20 sec.
MIL On Condition
  • 2 Driving Cycles
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