how to fix P0302 misfire code on my 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.
• Ensure the vehicle is parked on a level surface, and the engine is cool.
• Disconnect the negative battery terminal to avoid electrical shock.

2. Inspect and Replace Spark Plug

• Remove the ignition coil from cylinder 2.
• Remove the spark plug using a spark plug socket and ratchet.
• Inspect the spark plug for wear, carbon buildup, or damage.
• If necessary, replace with a new spark plug (OEM recommended gap: 0.028-0.031 inches).
• Reinstall the spark plug and ignition coil, ensuring proper torque (usually 15-20 ft-lbs).

3. Check and Replace Ignition Coil

• If the spark plug is in good condition, test the ignition coil using a multimeter (check resistance according to manufacturer specifications).
• If the ignition coil is faulty, replace it with a new one.
• Reinstall the ignition coil securely.

4. Inspect and Clean Fuel Injector

• Remove the fuel injector for cylinder 2.
• Inspect for clogs or carbon buildup.
• Clean the injector using a fuel injector cleaning kit or replace it if necessary.
• Reinstall the fuel injector with proper sealing and torque specifications.

5. Compression Test

• If misfire persists, perform a compression test on cylinder 2.
• If the compression is below specifications (typically around 130-180 psi), further investigation into internal engine components may be required.