my Volvo XC60 has a check engine light and code P0302, what should I do?

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

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket, anti-seize compound.
• Remove the engine cover if applicable.
• Disconnect the ignition coil connector for cylinder 2.
• Remove the ignition coil from cylinder 2 by unbolting it.
• Remove the old spark plug using a spark plug socket.
• Inspect the spark plug for wear or fouling. If damaged, replace with a new spark plug, using the manufacturer-recommended part.
• Apply a small amount of anti-seize compound to the threads of the new spark plug.
• Torque the new spark plug to the manufacturer's specifications (typically around 13-15 lb-ft).
• Reinstall the ignition coil and connector.

3. Inspect and Replace Fuel Injector

• Tools Required: Fuel line removal tool, socket set, torque wrench, safety glasses.
• Ensure the fuel system is depressurized before disconnecting any fuel lines.
• Remove the fuel injector connector for cylinder 2.
• Remove the fuel rail if necessary, following safe procedures to avoid fuel spills.
• Remove the old fuel injector from cylinder 2.
• Install the new fuel injector, ensuring proper seating and alignment.
• Reassemble the fuel rail and reconnect all connectors.

4. Compression Test (if necessary)

• Tools Required: Compression tester.
• Remove the spark plug from cylinder 2.
• Insert the compression tester and crank the engine for a few seconds.
• Record the compression reading and compare it to the manufacturer’s specifications.
• If the reading is low, further diagnostics may be necessary to identify internal engine issues.