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Home >> Kia >> 2014 >> Rio LX, 4D Hatchback, Automatic Trans >> 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

Item Detecting Condition Possible Cause
DTC Strategy
  • Engine roughness through crankshaft speed fluctuation
  1. Poor connection
  2. Ignition system
  3. Fuel system
  4. Intake/exhaust air system
  5. Ignition timing
  6. Injector
Case1 Enable Conditions
  • 400 rpm < Engine speed < 4520rpm
  • Engine load > Zero torque line
Threshold Value
  • Misfire rate > 3.25% per 1000 rev.
MIL ON Condition
  • 2 driving cycle
Case2 Enable Conditions
  • Intake air temperature > 17.6°F
  • Coolant temperature > 17.6°F
Threshold Value
  • Misfire rate > 2.5~22.2% per 200 rev. (Depends on driving conditions)
MIL ON Condition
  • Immediately (Blink)
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