Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSHYUNDAI2013GENESIS COUPE 2.0T PREMIUMREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 43 (ENGINE CONTROL SYSTEM (DTC TROUBLESHOOTING) (2 OF 3) - 2.0L)DTC P0300: RANDOM/MULTIPLE CYLINDER MISFIRE DETECTEDDTC DETECTING CONDITION

2013 Hyundai Genesis Coupe 2.0T Premium

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

2013 Hyundai Genesis Coupe 2.0T PremiumSECTION DTC Detecting Condition

WARNING: This page is about a different car, the 2012 Hyundai Genesis Coupe. However, it is still accessible from the selected car via links, so may be relevant.

DTC DETECTING CONDITION CHART

Item	Detecting Condition	Possible Cause
DTC Strategy	Calculation of engine roughness	Faulty spark plugs 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	Engine load ratio: 14~64% 500< Engine speed (RPM) <6700 Mass air flow gradient/sec.: 12~60% Throttle gradient/sec.: 0.5~10.5% Coolant temperature >20°C (68°F) if start temp. <-7°C (19° F) No relevant failure Fuel cut-off not active 11V< Battery voltage <16V
Threshold Value	Misfire detected on 2 or more cylinders
Diagnostic Time	Continuous
Mil On Condition	Immediate (Misfire enough to damage the catalyst) 2 Driving Cycles (Misfire breaking the emission regulation)

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.