how to fix P0302 misfire code in Genesis G70 IG (2017-2023)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the battery to ensure safety while working on electrical components.

Tools Required:

• OBD-II scanner
• Spark plug socket and ratchet
• Compression tester
• Multimeter
• Wrench set
• Torque wrench

2. Replace Spark Plug

• Remove the ignition coil from cylinder 2 by unfastening any retaining clips or bolts.
• Disconnect the electrical connector from the ignition coil.
• Using a spark plug socket, remove the old spark plug from cylinder 2.
• Inspect the spark plug hole for debris and clean if necessary.
• Install the new spark plug, hand-tighten it, then torque it to the manufacturer’s specifications (usually around 13-15 lb-ft).
• Reattach the ignition coil and reconnect the electrical connector.

3. Test and Replace Ignition Coil (if needed)

• Use the multimeter to check the resistance of the ignition coil for cylinder 2. Compare readings to manufacturer specifications.
• If the coil is faulty, remove it and replace it with a new one.
• Reinstall the ignition coil and ensure it is securely connected.

4. Check Fuel Injector

• Remove the fuel injector from cylinder 2 by disconnecting the electrical connector and unfastening any retaining clips.
• Inspect the injector for clogs; clean or replace it if necessary.
• Reinstall the fuel injector, ensuring it is properly seated and secured.

5. Perform Compression Test

• Remove the spark plug from cylinder 2.
• Insert the compression tester into the spark plug hole and crank the engine to take a reading.
• Compare the reading with the manufacturer's specifications. If the compression is low, further investigation may be needed for internal engine issues.

Safety Warnings:

• Always disconnect the battery before working on the ignition system.
• Allow the engine to cool before performing any work on engine components.