what causes a check engine light with code P0301 in my Genesis G70 IG (2017-2023)?

Learn how to diagnose and fix P0301 cylinder 1 misfire in Genesis G70. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

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

2. Inspect and Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Disconnect the ignition coil connector for cylinder 1.
  3. Unbolt and remove the ignition coil.
  4. Remove the spark plug using a spark plug socket.
  5. Inspect the spark plug for signs of wear or carbon buildup. Replace if necessary.
  6. Apply anti-seize lubricant on the threads of the new spark plug.
  7. Install the new spark plug and torque to manufacturer specifications (usually around 13 lb-ft).
  8. Reinstall the ignition coil and connector.

3. Inspect and Replace Ignition Coil (if necessary)

• Sub-steps:
  1. If the ignition coil shows signs of damage or does not test correctly, remove the faulty coil.
  2. Install the new ignition coil and securely connect the wire harness.
  3. Recheck all connections and ensure the coil is seated properly.

4. Check Fuel Injector

• Sub-steps:
  1. Disconnect the fuel injector connector for cylinder 1.
  2. Use a multimeter to check the resistance of the injector; replace if it's out of specification.
  3. If the injector is faulty, remove the old injector and install a new one.
  4. Reconnect the fuel injector connector.

5. Final Assembly

• Reinstall any removed components, including the engine cover.
• Reconnect the battery.