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Home >> Hyundai >> 2003 >> Elantra GLS, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P2251: Ho2S Reference Ground Circuit Open (Bank 1/Sensor 1) >> 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
  • Open circuit check of front HO2S circuit
  • Contact resistance in connectors
  • Open or Short to ground in HO2S circuit
  • Front HO2S
Enable Conditions
  • No Pump current malfunction
Threshold Value
  • Symptom detected on Plausibility in PUC with "signal too high"
Diagnostic Time
  • Approx. 1300 sec.
MIL On Condition
  • 2 Driving Cycles
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