how to fix P0302 code in my Volvo XC60 Second Generation (2018-2024)

Learn how to diagnose and fix P0302 cylinder 2 misfire in Volvo XC60. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the engine is cool and disconnect the negative battery terminal.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, dielectric grease.
• Sub-steps:
  1. Remove the engine cover if necessary.
  2. Disconnect the ignition coil connector from the spark plug.
  3. Remove the ignition coil using the socket set.
  4. Remove the spark plug using the spark plug socket.
  5. Inspect the spark plug for wear; replace if necessary.
  6. Apply a small amount of dielectric grease to the threads of the new spark plug.
  7. Install the new spark plug and torque to the manufacturer’s specifications (typically around 15-20 lb-ft).
  8. Reinstall the ignition coil and reconnect the connector.

3. Inspect/Replace Ignition Coil

• Tools Required: Socket set, multimeter (for testing).
• Sub-steps:
  1. If misfire persists, remove the ignition coil from cylinder 2 as outlined in the previous step.
  2. Test the ignition coil with a multimeter for primary and secondary resistance.
  3. Replace the ignition coil if it fails the test.
  4. Reinstall the ignition coil and reconnect the connector.

4. Check Fuel Injector

• Tools Required: Fuel injector tester, basic hand tools.
• Sub-steps:
  1. Disconnect the fuel injector connector at cylinder 2.
  2. Use a fuel injector tester to ensure the injector is firing correctly.
  3. Replace the fuel injector if it is not functioning properly.
  4. Reconnect the fuel injector connector.

5. Compression Test

• Tools Required: Compression tester.
• Sub-steps:
  1. Remove the spark plug from cylinder 2.
  2. Insert the compression tester into the spark plug hole.
  3. Crank the engine for several seconds and record the compression reading.
  4. Compare the reading to manufacturer specifications. If low, further investigation into engine issues may be required.