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 40 (ENGINE CONTROL SYSTEM (DTC TROUBLESHOOTING) (2 OF 4) - 3.8L)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		Determine if a multiple cylinder misfire or a cylinder specific misfire is occurring by monitoring Crankshaft acceleration.	Faulty Spark plugs Faulty Spark plug cables Air Leakage Belt deflection and Air gap of CKPS Incorrect timing Faulty injector Improper fuel pressure Improper engine compression
Enable Conditions		No disabling faults present/no disabling Active Faults P0340/P0341/P0118/P0117/P0115/P0336/P0335/P1295/P0103/P0102/0108/P0107/P0106/P0501 Engine speed between 550 and 5800 RPM System voltage between 9 and 18 volts The ECT indicates an engine temperature between -6°C (20°F) and 120°C (248°F)
Threshold value	Case 1	Individual cylinder misfire detection
	Case 2	Emissions damaging - 18 times in 600 Ignitions (In case that the misfire affects more than 1.5 times than FTP emissions)
	Case 3	Catalyst damaging - 95 times in 600 Ignitions at idle (It is going to be changeable according to the load or the temperature which is not in the range where it does not melt catalyst)
Diagnosis Time		Continuous
MIL On Condition		2 Driving Cycles

RENDER: 1.0x

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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.