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Home >> Kia >> 2019 >> Rio LX >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (3 Of 6) >> DTC P0300-00: Random/Multiple Cylinder Misfire Detected >> DTC Information >> DTC Detecting Condition

DTC Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy
  • Calculation of Engine Roughness
  • Poor connector connection
  • Ignition system
  • Fuel system
  • Intake/exhaust air system
  • Ignition timing
  • Injector
  • Bad quality fuel
Enable Conditions Case 1
  • Engine speed is at between 510RPM and 4500RPM
  • Engine Torque is greater than Zero torque
  • Time after engine start is greater than 25s
  • If ECT@start is less than -7°C (19.4°F)
  • Then ECT is greater than 21°C (69.8°F)
  • Else ECT is greater than -7°C (19.4°F)
  • No rough road detection
  • Remark: (Rough Road Condition Check) Wheel acceleration is less than 30m/sec2 (determined by vehicle speed sensor)
Case 2
  • Engine speed is at between 510RPM and 4500RPM
  • Engine Torque is greater than Zero torque
  • If ECT@start is less than -7°C (19.4°F)
  • Then ECT is greater than 21°C (69.8°F)
  • Else ECT is greater than -7°C (19.4°F)
  • No rough road detection
Threshold Value Case 1
  • Misfire rate is greater than 5% within1000 revs
Case 2
  • Misfire rate (Catalyst damage Catalyst temperature is greater than 1050°C (1922°F)) is greater than 5~33% within 200 revs
Diagnostic Time Case 1
  • 1000 revolutions
Case 2
  • 200 revolutions
MIL ON Condition Case 1
  • 3 driving cycles
Case 2
  • 1 drive cycle (Blink)