how to fix P0302 misfire code in Volvo XC60 First Generation (2008-2017)

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 required for the repair.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the ignition coil from cylinder 2 by unscrewing the retaining bolts and gently pulling it out.
• Use the spark plug socket to remove the spark plug from cylinder 2.
• Inspect the spark plug for wear, carbon deposits, or damage.
• If necessary, replace the spark plug with a new one that meets manufacturer specifications (typically NGK or Bosch).
• Torque the new spark plug to the manufacturer-recommended value (usually around 20 Nm).

3. Test and Replace Ignition Coil

• Inspect the ignition coil for cracks or corrosion.
• If the coil is damaged or if a known working coil is available, replace the ignition coil in cylinder 2.
• Reinstall the ignition coil by reversing the removal steps and ensuring it is securely fastened.

4. Fuel Injector Inspection and Cleaning

• Disconnect the fuel injector connector and remove the fuel rail if necessary.
• Inspect the fuel injector for any clogs or leaks.
• Clean or replace the fuel injector if it is found to be faulty. Ensure proper installation and torque specifications are followed.

5. Check for Vacuum Leaks

• Inspect all vacuum hoses connected to the intake manifold and ensure they are secured and free of cracks.
• Use a smoke machine or soapy water to check for leaks; repair or replace any damaged hoses.