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Home >> Kia >> 2021 >> Sedona EX >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (4 Of 7) >> 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
  • Determine if a multiple cylinder misfire or a cylinder specific misfire is occurring by monitoring crankshaft rotation speed
  • Faulty Spark plugs
  • Faulty Spark plug cables
  • Air Leakage
  • Belt deflection and Air gap of CKPS
  • Incorrect timing
  • Faulty injector
  • Improper fuel pressure
  • Improper engine compression
Enable Conditions
  • Engine load ratio is greater than 6.7 to 38%
  • Engine speed is between 400 rpm and 6700 rpm
  • Barometric pressure (BARO) is greater than 75 kPa
  • Engine load ratio gradient is lower than 12~60%/s
  • Throttle gradient is less than 58.6~1265.6%/s
  • Engine Coolant Temperature (ECT) is greater than 20.3°C (68.54°F)

    (if start temperature is lower than -7°C (19.4°F)

  • Battery Voltage is between 11V and 16V
  • Fuel cut off is not active
Threshold Value Case 1
  • Federal Test Procedure (FTP) emission is greater than OBD emission threshold
Case 2
  • Catalyst temperature is greater than 1000°C (1832°F)
Diagnosis Time Case 1
  • 1000 revs or 4*1000 revs
Case 2
  • 200 revs or 3*200 revs
MIL On Condition Case 1
  • 2 drive cycles
Case 2
  • 1 drive cycle