how to fix P0302 misfire code in 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 safety equipment.
• Ensure the engine is cool and disconnect the negative battery terminal.
• Tools required: Socket set, torque wrench, spark plug socket, multimeter, fuel injector cleaner, compression tester.

2. Replace Spark Plug

• Remove the engine cover if applicable.
• Use the spark plug socket to remove the spark plug from cylinder 2.
• Inspect the old spark plug; replace if worn or fouled.
• Install a new spark plug (use OEM specifications) and torque to manufacturer specifications (typically around 15-20 lb-ft).
• Reattach the engine cover if removed.

3. Inspect and Replace Ignition Coil

• Disconnect the ignition coil connector from cylinder 2.
• Remove the ignition coil using the socket set.
• Inspect for cracks or signs of arcing on the ignition coil.
• Replace with a new ignition coil if necessary.
• Reinstall the ignition coil and reconnect the connector.

4. Test and Clean Fuel Injector

• If symptoms persist, remove the fuel injector from cylinder 2.
• Use a multimeter to test the fuel injector’s resistance (should be within OEM specifications).
• Clean the injector with a fuel injector cleaner or replace it if faulty.
• Reinstall the injector ensuring proper seating and connection.

5. Conduct Compression Test

• If misfire persists, perform a compression test on cylinder 2.
• Insert the compression tester into the spark plug hole of cylinder 2.
• Crank the engine and record the compression reading.
• Compare the reading to manufacturer specifications (typically should be around 150-200 psi).
• If compression is low, further investigation into engine internals may be required.