how to fix P0303 code on my Volvo XC60 First Generation (2008-2017)

Learn how to diagnose and fix P0303 cylinder 3 misfire in Volvo XC60. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather tools and parts required.
• Ensure the vehicle is parked on a flat surface, and the engine is cool.
• Disconnect the battery to avoid electrical shorts.

2. Inspect and Replace Spark Plug

• Remove the spark plug cover if applicable.
• Use a socket set to remove the spark plug from cylinder 3.
• Inspect the spark plug for wear, carbon buildup, or damage.
• If the spark plug is damaged, replace it with a new one, using the manufacturer’s recommended part number.
• Torque the new spark plug to the manufacturer's specifications (typically around 13-15 lb-ft).

3. Check and Replace Ignition Coil

• Remove the ignition coil for cylinder 3 by unscrewing the mounting bolts.
• Inspect the ignition coil for cracks or wear.
• If defective, replace with a new ignition coil compatible with the Volvo XC60.
• Reinstall the ignition coil and secure it with the bolts.

4. Inspect and Replace Fuel Injector

• Disconnect the fuel injector connector and remove the injector from cylinder 3.
• Check the injector for clogs or wear.
• Clean the injector or replace it if necessary with a new one.
• Reinstall the fuel injector and reconnect the electrical connector.

5. Compression Test

• Remove the spark plug from cylinder 3.
• Install a compression gauge and crank the engine to measure the compression.
• Compare the reading with the manufacturer's specifications. If low, further investigation into internal engine components may be needed.

6. Reassemble and Reconnect

• Reinstall all components and connectors removed during the repair.
• Reconnect the battery.
• Start the engine and allow it to idle.