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HOMESERVICE MANUALSKIA2017RIO EX, 4D HATCHBACKREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROL SYSTEM DIAGNOSIS (2 OF 3)DTC P0302: CYLINDER 2-MISFIRE DETECTEDGENERAL INFORMATIONDTC DETECTING CONDITION
2017 Kia Rio EX, 4D Hatchback

General Information: DTC Detecting Condition

2017 Kia Rio EX, 4D HatchbackSECTION DTC Detecting Condition
Item Detecting Condition Possible Cause
DTC Strategy
  • Engine roughness through crankshaft speed fluctuation
  1. Poor connection
  2. Ignition system
  3. Fuel system
  4. Intake/exhaust air system
  5. Ignition timing
  6. Injector
Enable Conditions
  • Time after engine start > 25s
  • No CKP sensor error
  • No rough road condition
  • No fuel cut off condition
Threshold Value
  • Misfire rate/cylinder > 10% of total misfire rate (emission threshold)
  • Misfire rate/cylinder > 25% of total misfire rate (catalyst damage threshold)
Diagnostic Time
  • Continuous
MIL ON Condition
  • 2 driving cycle or Immediately (Blink)
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.