my Volvo XC60 Second Generation (2018-2024) has a check engine light code P0302

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 required for the repair.
• Disconnect the negative battery terminal to ensure safety.

Tools Required:

• OBD-II scanner
• Socket set
• Torque wrench
• Multimeter
• Fuel pressure gauge
• Compression tester

2. Inspect and Replace Spark Plugs

1. Remove the engine cover if applicable.
2. Use a socket wrench to remove the spark plug from cylinder 2.
3. Inspect the spark plug for signs of wear (e.g., carbon build-up, electrode damage).
4. If needed, replace the spark plug with a manufacturer-recommended part, ensuring the gap is set to specifications.
5. Reinstall the spark plug and torque it to the manufacturer’s specification (usually around 13-15 lb-ft).

3. Check and Replace Ignition Coil

1. Remove the ignition coil from cylinder 2 by unscrewing its mounting bolt and disconnecting the electrical connector.
2. If testing, swap the ignition coil with a working coil from another cylinder.
3. If the misfire moves to the other cylinder, replace the faulty ignition coil.
4. Reinstall the ignition coil and ensure the connector is securely attached.

4. Inspect Fuel Injector

1. Remove the fuel rail if required to access the injector for cylinder 2.
2. Check the fuel injector for clogs or leaks. Use a multimeter to test the injector's resistance, ensuring it falls within manufacturer specifications.
3. Clean or replace the fuel injector if necessary.
4. Reinstall the fuel rail and ensure all connections are secure.

5. Compression Test

1. Remove the spark plug from cylinder 2.
2. Insert the compression tester into the spark plug hole.
3. Crank the engine and read the compression. Compare this value to the manufacturer’s specifications.
4. If compression is low, further diagnosis of the engine internals may be necessary.