how to fix P0302 code in my Volvo XC60 536 (2017-Present)

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, fuel injector cleaner.
• Safety Warnings: Disconnect the battery before working on electrical systems and allow the engine to cool before opening.

2. Replace Spark Plug

• Remove the engine cover if necessary.
• Disconnect the ignition coil connector from the spark plug.
• Use a socket wrench to remove the spark plug from cylinder 2.
• Inspect the old spark plug for wear; replace it with a new spark plug that matches the manufacturer's specifications.
• Torque the new spark plug to the manufacturer’s specifications (typically around 15-20 lb-ft).
• Reconnect the ignition coil and engine cover.

3. Inspect and Replace Ignition Coil

• If the spark plug is fine, remove the ignition coil from cylinder 2.
• Check for cracks or damage. If damaged, replace it with a new ignition coil.
• Reinstall the ignition coil and reattach the connector.

4. Clean or Replace Fuel Injector

• If the ignition coil is functioning properly, test the fuel injector for cylinder 2.
• If clogged, use a fuel injector cleaner to attempt a fix. If ineffective, replace the fuel injector.
• To replace, disconnect the fuel line, remove the injector, and install the new one. Ensure it is seated properly.

5. Compression Test (if necessary)

• If misfires persist, perform a compression test on cylinder 2.
• If compression is low, further investigation into engine internals may be required (valve seals, head gasket).