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

Learn how to diagnose and fix P0302 cylinder 2 misfire in Volvo XC60 (2018-2024). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather tools and parts needed for repair.
• Disconnect the battery negative terminal to ensure safety.
• Allow the engine to cool before beginning work.

2. Inspect and Replace Spark Plug

• Tools Required: Spark plug socket, ratchet, torque wrench
• Remove the spark plug wire or ignition coil from cylinder 2.
• Using a spark plug socket, carefully remove the spark plug.
• Inspect the spark plug for fouling, wear, or damage. Replace if necessary.
• Install a new spark plug, tightening it to the manufacturer’s specified torque (typically around 15 ft-lbs).

3. Inspect and Replace Ignition Coil

• Remove the ignition coil from cylinder 2 after unplugging it.
• Inspect the ignition coil for cracks or signs of electrical failure.
• If faulty, install a new ignition coil, ensuring it clicks into place securely.

4. Check and Clean Fuel Injector

• Disconnect the fuel injector connector for cylinder 2.
• Use a noid light to check if the fuel injector is receiving proper signals.
• If the injector is faulty, remove it using a ratchet and socket.
• Clean the injector or replace it with a new one if necessary.

5. Perform Compression Test

• Connect a compression tester to the spark plug hole of cylinder 2.
• Crank the engine to get a reading and compare it with the manufacturer's specifications.
• If the compression is low, further diagnosis is needed for potential internal engine issues.