why does my Volvo XC60 Second Generation (2018-2024) have a check engine light with code P0302

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.
• Disconnect the negative battery terminal to ensure safety during repairs.
• Tools Required: OBD-II scanner, socket set, torque wrench, multimeter, compression tester.

2. Inspect and Replace Spark Plug

• Remove the ignition coil from cylinder 2.
  • Tools Required: Socket set.
  • Safety Warning: Ensure the engine is cool before starting work.
• Remove the spark plug from cylinder 2 using a spark plug socket.
• Inspect the spark plug for wear or damage; replace if necessary.
• Install a new spark plug, tightening to manufacturer specifications (typically 13-15 ft-lbs).

3. Inspect and Replace Ignition Coil

• Test the ignition coil for cylinder 2 using a multimeter.
• If faulty, remove the ignition coil.
  • Tools Required: Socket set.
• Install a new ignition coil and reconnect the electrical connector.

4. Check Fuel Injector

• Disconnect the fuel injector connector for cylinder 2.
• Test the injector's resistance with a multimeter to ensure it is within specifications.
• If faulty, remove and replace the fuel injector.
  • Tools Required: Fuel line disconnect tool, socket set.
• Reinstall the fuel injector and reconnect the connector.

5. Verify Engine Compression

• If the misfire persists, perform a compression test on cylinder 2.
• If compression is low, further investigation is needed for potential internal engine issues (valves, piston rings).