how to fix P0301 cylinder 1 misfire in Volvo XC60 536 (2017-Present)

Learn how to diagnose and fix P0301 cylinder 1 misfire in Volvo XC60. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to prevent electrical shorts.
• Allow the engine to cool before starting work.

2. Inspect and Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Disconnect the ignition coil connector from cylinder 1.
  3. Remove the ignition coil by unscrewing and gently pulling it out.
  4. Remove the spark plug using a spark plug socket.
  5. Inspect the spark plug for wear or carbon deposits. Replace with a new spark plug if necessary (OE specification).
• Tools Required:
  • Spark plug socket
  • Ratchet and extensions
  • Torque wrench (set to manufacturer’s specifications)

3. Check and Replace Ignition Coil

• Sub-steps:
  1. Test the ignition coil using a multimeter to verify resistance. Compare it to manufacturer specifications.
  2. If faulty, replace the ignition coil with a new one (ensure it matches the OEM part).
  3. Reinstall the ignition coil and reconnect the electrical connector.
• Tools Required:
  • Multimeter

4. Perform 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 several times to obtain a reading.
  4. Compare the reading with manufacturer specifications. If low, further diagnosis of internal engine components may be necessary.
• Tools Required:
  • Compression gauge

5. Inspect Fuel Injector

• Sub-steps:
  1. Remove the fuel injector connector and unscrew the fuel rail retaining bolts.
  2. Carefully pull the fuel rail to access the injector.
  3. Inspect the injector for clogs and test its operation using a fuel injector tester.
  4. Replace the injector if it is found to be faulty.
• Tools Required:
  • Fuel injector tester