LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Kia >> 2020 >> Optima Plug-In Hybrid EX >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (3 Of 6) (PHEV) >> DTC P0300-00: Random/Multiple Cylinder Misfire Detected >> DTC Information >> DTC Detecting Condition
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy
  • Multiple Misfire Monitoring
  1. Poor Connector Connection
  2. Incorrect Valve Timing
  3. Uneven Compression
  4. Air Leakage
  5. Improper Fuel Pressure or Dirty Fuel
  6. Blocked/Leaking Injectors
  7. Leakage Between Cooling System and System
Enable Conditions One cylinder misfire detected when following conditions are satisfied
  • Cylinder A: Engine load ratio is 10% higher than standard value
  • Cylinder B: Engine load ratio is 10% higher than standard value
Threshold Value
  • Misfire detected on 2 or more cylinders
Diagnostic Time
  • Continuous
Mil On Condition
  • 2 Driving Cycles