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Home >> Hyundai >> 2011 >> Accent GL >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (1 Of 2) >> DTC P0300: Random Multiple Cylinder Misfire Detected >> General Information >> DTC Detecting Condition

General Information: DTC Detecting Condition

DTC DETECTING CONDITION CHART

Item Detecting Condition Possible Cause
DTC Strategy
  • Engine roughness through crankshaft speed fluctuation
  • Poor connection
  • Ignition system
  • Fuel system
  • Intake/exhaust air system
  • Ignition timing
  • Injector
  • ECM
Enable Conditions
  • Engine speed 510 ~ 6480 RPM
  • Engine load > Zero torq.
  • Eng. load change < Max.
  • Eng. speed change < Max.
  • Calculated wheel acceleration < 20 ~ 38
  • Time after engine start > 0
  • Intake air temperature > -30 °C
Case 1 Threshold Value
  • Misfire rate for FTP (Federal Test Procedure) emission thresh > 5%
Diagnostic Time
  • 1000 revs
MIL ON Condition
  • 2 driving cycle
Case 2 Threshold Value
  • 16% < Misfire rate for catalyst damage < 90%
Diagnostic Time
  • 200 revs
MIL ON Condition
  • Immediately (Blink)
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