how to fix P0301 misfire code on 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.
• Ensure the vehicle is parked on a flat 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 gap tool.
• Remove the engine cover if applicable.
• Remove the spark plug wire/coil from cylinder 1.
• Use a socket to remove the spark plug.
• Inspect the spark plug for wear; replace if necessary.
• Ensure the new spark plug is gapped correctly according to manufacturer specifications.
• Install the new spark plug and torque it to the manufacturer's specification (typically around 13-15 lb-ft).
• Reattach the ignition coil or spark plug wire.

3. Inspect and Replace Ignition Coil

• Tools Required: Socket set, torque wrench.
• Remove the ignition coil from cylinder 1.
• Check the ignition coil for visible damage or cracks. If necessary, replace it.
• Install the new ignition coil and torque to manufacturer specifications.

4. Test Fuel Injector

• Tools Required: Fuel injector cleaner, multimeter.
• Disconnect the fuel injector connector for cylinder 1.
• Use a multimeter to check for voltage and ground at the injector connector while cranking the engine.
• If the injector is not functioning, replace it.
• Reconnect the fuel injector connector.

5. Compression Test

• Tools Required: Compression gauge.
• Remove the spark plug from cylinder 1.
• Insert the compression gauge into the spark plug hole.
• Crank the engine and record the compression reading. Compare it to manufacturer specifications (typically between 150-200 psi).
• If the compression is low, further investigation is needed into engine internals.