my Genesis G70 IG (2017-2023) has a check engine light with P0301 code, what to do?

Learn how to diagnose and fix P0301 cylinder 1 misfire in Genesis G70 (2017-2023). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather tools and parts.
• Disconnect the battery to avoid electrical shorts.
• Allow the engine to cool before proceeding.

2. Inspect and Replace Spark Plug

• Sub-steps:
  1. Remove the ignition coil from cylinder 1 by unscrewing the mounting bolt and disconnecting the electrical connector.
  2. Remove the spark plug using a socket wrench.
  3. Inspect the spark plug for fouling, damage, or wear. Replace it if necessary.
• Tools Required: Socket set, torque wrench, spark plug socket.

3. Inspect and Replace Ignition Coil

• Sub-steps:
  1. If the spark plug is in good condition, check the ignition coil for signs of damage or malfunction.
  2. Replace the ignition coil if it shows signs of wear.
• Tools Required: Socket set.

4. Test Fuel Injector

• Sub-steps:
  1. Disconnect the fuel injector connector for cylinder 1.
  2. Use a noid light to check for voltage to the injector while cranking the engine. Replace the injector if no voltage is detected.
  3. If voltage is present, test the injector's resistance using a multimeter. Replace if out of specification.
• Tools Required: Noid light, multimeter.

5. Perform a Compression Test

• Sub-steps:
  1. Remove the spark plug from cylinder 1.
  2. Insert the compression gauge into the spark plug hole.
  3. Crank the engine and record the compression reading. Compare it to manufacturer specifications.
  4. If compression is low, further investigation into piston rings or valves may be required.
• Tools Required: Compression gauge.