how to fix P0301 misfire code in my Volvo XC60 Second Generation (2018-2024)

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 necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool before starting work.

2. Replace Spark Plug

• Remove the engine cover if necessary.
• Use a spark plug socket and ratchet to remove the spark plug from cylinder 1.
• Inspect the old spark plug for signs of wear, fouling, or damage.
• Install a new spark plug, ensuring it is gapped to manufacturer specifications (0.028-0.031 inches for the XC60).
• Torque the spark plug to the manufacturer-recommended specification (typically around 13-16 lb-ft).

3. Inspect and Replace Ignition Coil

• Disconnect the electrical connector from the ignition coil for cylinder 1.
• Remove the ignition coil by unscrewing it from the engine.
• Compare the old coil to the new one to ensure compatibility.
• Install the new ignition coil, securing it with bolts to the specified torque.
• Reconnect the electrical connector.

4. Check and Clean Fuel Injector

• Disconnect the fuel injector electrical connector and remove the fuel injector by unscrewing it from the fuel rail.
• Inspect the injector tip for clogs; clean if necessary using a specialized injector cleaner.
• Reinstall the fuel injector, ensuring proper sealing and securing it to the fuel rail.
• Reconnect the electrical connector.

5. Test Fuel Pressure

• Connect a fuel pressure gauge to the fuel rail.
• Turn the ignition to the ON position (do not start the engine) and check the fuel pressure against manufacturer specifications (typically 50-60 psi).
• If pressure is inadequate, check the fuel pump and fuel filter for issues.