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General Information: DTC Detecting Condition

DTC DETECTING CONDITION REFERENCE CHART

Item Detecting Condition Possible Cause
DTC Strategy
  • No signal activity
  1. Poor connection
  2. Open or Short to ground in harness
  3. HO2S (B1/S2)
  4. ECM
Enable Conditions
  • Battery voltage > 10.7V
  • Lambda = 0.9 for 9 sec
Threshold value
  • Downstream O2S voltage < 0.65V
Diagnosis Time
  • 9 sec
MIL On Condition
  • 2 Driving Cycle
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