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Home >> Hyundai >> 2015 >> Azera Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (2 Of 3) >> DTC P0300: Random/Multiple Cylinder Misfire Detected >> General Information >> DTC Detecting Condition
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General Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy
  • Determine if a multiple cylinder misfire or a cylinder specific misfire is occurring by monitoring crankshaft acceleration.
  1. Faulty Spark plugs
  2. Faulty Spark plug cables
  3. Air Leakage
  4. Belt deflection and Air gap of CKPS
  5. Incorrect timing
  6. Faulty injector
  7. Improper fuel pressure
  8. Improper engine compression
Enable Conditions No disabling faults present/no disabling Active Faults
  • P0340/P0341/P0118/P0117/P0115/P0336/P0335/P1295/P0103/P0102/0108/P0107/P0106/P0501
  • Engine speed between 550 and 5800 RPM
  • System voltage between 9 and 18 volts
  • The ECT indicates an engine temperature between -6°C (20°F) and 120°C (248°F)
Threshold value Case 1
  • Individual cylinder misfire detection
Case 2
  • Emissions damaging - 18 times in 600 ignitions

(In case that the misfire affects more than 1.5 times than FTP emissions)
Case 3
  • Catalyst damaging - 95 times in 600 ignitions at idle

(It is going to be changeable according to the load or the temperature which is not in the range where it does not melt catalyst)
Diagnosis Time
  • Continuous
MIL On Condition
  • 2 Drive Cycles
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