how to fix P0301 misfire code on my Volvo XC60 First Generation (2008-2017)

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 tools and parts.
• Disconnect the negative battery terminal to ensure safety.

2. Replace Spark Plug

• Tools Required: Spark plug socket, ratchet, torque wrench.
• Remove the ignition coil from cylinder 1 by unscrewing the bolts securing it.
• Carefully pull out the ignition coil and set it aside.
• Use the spark plug socket to remove the spark plug from cylinder 1.
• Inspect the new spark plug for correct gap and install it in cylinder 1, torquing to the manufacturer specification (usually around 15-20 ft-lbs).
• Reinstall the ignition coil and secure it with the bolts.

3. Test Ignition Coil

• Tools Required: Multimeter.
• If the ignition coil was found to be defective in the diagnostic steps, replace it.
• Disconnect the wiring harness from the ignition coil.
• Test the primary and secondary resistance using the multimeter as per manufacturer specifications.
• Replace the ignition coil if it fails the test.

4. Inspect/Replace Fuel Injector

• Tools Required: Fuel injector puller (if needed), ratchet, and socket set.
• If the fuel injector is suspected, remove the fuel rail to access the injector for cylinder 1.
• Inspect the injector for clogs; clean or replace if necessary.
• Reinstall the fuel rail and ensure all connections are secure.

5. Compression Test (if needed)

• Tools Required: Compression tester.
• Remove the spark plug and ignition coil again.
• Insert the compression tester into cylinder 1 and crank the engine.
• Note the reading; it should meet manufacturer specifications (usually around 150-200 psi).
• If the compression is low, further inspection of valves or piston rings may be necessary.