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HOMESERVICE MANUALSHYUNDAI2005SANTA FE GLS, 2.7 D, AWDREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROL SYSTEM DIAGNOSIS (2.7L) (2 OF 2)DTC TROUBLESHOOTING PROCEDURESDTC P0300: RANDOM/MULTIPLE CYLINDER MISFIRE DETECTEDDTC DETECTING CONDITION
2005 Hyundai Santa Fe GLS, 2.7 D, AWD

DTC P0300: Random/Multiple Cylinder Misfire Detected: DTC Detecting Condition

2005 Hyundai Santa Fe GLS, 2.7 D, AWDSECTION DTC Detecting Condition
DTC DETECTING CONDITION CHART

Item Detecting Condition Possible Cause
DTC Strategy
  • Misfire is detected on 2 or more cylinder
  • Faulty spark plugs, high-tension lead, or Ignition coil
  • Incorrect valve timing
  • Uneven compression
  • Air leakage
  • Improper Fuel pressure or dirty fuel.
  • Blocked/Leaking injectors
  • Leakage between cooling system and cylinder
Enable Conditions
  • 480 > Engine speed (RPM) > 6500
  • Intake air mass gradient is in predetermined range
  • No injector shut off
  • No rough road
(Case 1) Threshold Value
  • Misfire = 2.8 ~ 17% within 200 rev.
Diagnosis Time
  • 200 revolution: 3*200 revolution
MIL On Condition
  • Immediate
(Case 2) Threshold Value
  • First 1000 rev.: Misfire < 2%
  • After first 1000 rev.: Misfire < 2%
Diagnosis Time
  • 1000 revolution: 4*1000 revolution
MIL On Condition
  • 2 Driving Cycle
RENDER: 1.0x

NO RELATED

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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.