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Home >> Kia >> 2021 >> Niro Plug-In Hybrid EX >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (PHEV) (3 Of 6) >> DTC P0300-00: Random/Multiple Cylinder Misfire Detected >> DTC Information >> DTC Detecting Condition
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DTC Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy
  • Misfire rate
  • Poor connector connection
  • Ignition system
  • Fuel system
  • Intake or exhaust air system
  • Ignition timing
  • Injector
  • Bad quality fuel
Enable Condition
  • Normal auxiliary battery voltage (10 to 16V)
  • Engine speed is between 470 and 6200RPM
  • Engine load ratio is between 10 and 60% (depending on engine speed and ECT)
  • Engine coolant temperature is greater than -6.75°C (19.8°F)
  • Fuel cut off not active
  • Barometric pressure is greater than 75kPa
  • When the opening and closing of the throttle valve is greater than between 58.6 to 1265.6%/s
  • No rough load condition
Threshold Value
  • Two or more DTCs are detected among P030100 to P030400
Diagnostic Time
  • 1000 revolutions or 200 revolutions