my Genesis G70 IG (2017-2023) has a check engine light with code P0301, what does this mean

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 necessary tools and parts.
• Disconnect the negative battery terminal to avoid electrical shorts.

2. Inspect and Replace Spark Plug

• Sub-steps:
  • Remove the engine cover if applicable.
  • Locate the spark plug for cylinder 1.
  • Use a spark plug socket to remove the spark plug.
  • Inspect the spark plug for signs of wear (e.g., fouling, damage).
  • Replace with a new spark plug that meets manufacturer specifications (typically NGK or Denso brand).
  • Torque the new spark plug to the manufacturer’s specified value (usually around 13 lb-ft).

3. Inspect and Replace Ignition Coil

• Sub-steps:
  • Remove the ignition coil for cylinder 1 by unscrewing the retaining bolts.
  • Disconnect the ignition coil connector.
  • Inspect for cracks or damage.
  • Install a new ignition coil, ensuring it clicks into place.
  • Reconnect the ignition coil connector.

4. Inspect and Clean Fuel Injector

• Sub-steps:
  • Disconnect the fuel injector connector and remove the retaining clips.
  • Remove the fuel injector from the rail.
  • Inspect the injector for clogs and clean if necessary using an appropriate injector cleaner.
  • Reinstall the injector, ensuring proper seating and reconnect the injector connector.

5. Verify Compression

• Sub-steps:
  • Remove the spark plug from cylinder 1.
  • Insert a compression tester into the spark plug hole.
  • Crank the engine and note the compression reading; it should be within the manufacturer's specified range (typically 150-200 psi).
  • If compression is low, further diagnosis may be needed for internal engine issues.