how to fix the P0302 code on my Volvo XC60 Second Generation (2018-2024)

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

• Tools Required: OBD-II scanner, socket set, torque wrench, multimeter, compression tester.
• Safety Warnings: Disconnect the battery before working on electrical systems to prevent shorts.

2. Inspect and Replace Spark Plug

1. Remove the engine cover using a socket wrench.
2. Disconnect the ignition coil connector from the coil on cylinder 2.
3. Remove the ignition coil using a socket wrench.
4. Unscrew the spark plug from cylinder 2 using a spark plug socket.
5. Inspect the spark plug for wear or damage and replace if necessary with an OEM-spec spark plug.
6. Install the new spark plug and torque it to the manufacturer’s specification (usually around 15-20 lb-ft).
7. Reinstall the ignition coil and reconnect the ignition coil connector.

3. Inspect and Replace Ignition Coil

1. If the spark plug was fine, check the ignition coil for cylinder 2 using a multimeter.
2. If the ignition coil is faulty, replace it with an OEM-spec ignition coil.
3. Reconnect the ignition coil connector.

4. Inspect and Clean/Replace Fuel Injector

1. If misfire persists, remove the fuel injector from cylinder 2.
2. Inspect the injector for clogs; use a fuel injector cleaner if necessary.
3. If cleaning does not resolve the issue, replace the fuel injector with an OEM part.
4. Reinstall the fuel injector, ensuring it is seated properly and reconnect the electrical connector.

5. Perform Compression Test

1. If misfire continues, perform a compression test on cylinder 2.
2. If compression is low, further investigation into the cylinder head, piston rings, or valves may be needed.