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Home >> Kia >> 2008 >> Rio Base, Automatic >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> DTC Troubleshooting Procedures (1 Of 2) >> DTC P0300 Random/Multiple Cylinder Misfire Detected; DTC P0301 Cylinder 1 - Misfire Detected; DTC P0302 Cylinder 2 - Misfire Detected; DTC P0303 Cylinder 3 - Misfire Detected; DTC P0304 Cylinder 4 - Misfire Detected >> DTC Detecting Condition

DTC P0300 Random/Multiple Cylinder Misfire Detected; DTC P0301 Cylinder 1 - Misfire Detected; DTC P0302 Cylinder 2 - Misfire Detected; DTC P0303 Cylinder 3 - Misfire Detected; DTC P0304 Cylinder 4 - Misfire Detected: DTC Detecting Condition

DTC DETECTING CONDITION AND POSSIBLE CAUSES

Item Detecting Condition Possible Cause
DTC Strategy
  • Engine roughness through crankshaft speed fluctuation
  • Poor connection
  • Ignition system
  • Fuel system
  • Intake/exhaust air system
  • Ignition timing
  • Injector
  • ECM/PCM
Enable Conditions
  • Engine speed 510-6480 RPM
  • Engine load > Zero torque.
  • Eng. load change < Max.
  • Eng. speed change < Max.
  • Calculated wheel acceleration < 20-38
  • Time after engine start > 0
  • Intake air temperature > -30°C (-22°F)
Case 1 Threshold Value
  • Misfire rate for FTP (Federal Test Procedure) emission thresh > 5%
Diagnostic Time
  • 1000 revs
MIL ON Condition
  • 2 driving cycle
Case2 Threshold Value
  • 4% < Misfire rate for catalyst damage < 22%
Diagnostic Time
  • 200 revs
MIL ON Condition
  • Immediately (Blink)
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