my Volvo XC60 536 (2017-Present) has a check engine light with code P0302, what does that mean?

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 all necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery to prevent electrical shorts.

2. Inspect and Replace Ignition Components

• Remove the engine cover (if applicable) using a socket set.
• Unplug the ignition coil from cylinder 2.
• Remove the ignition coil by unscrewing the retaining bolts.
• Inspect the spark plug for wear or carbon fouling, then remove it from the cylinder head.
• Replace the spark plug with a new one, ensuring it is gapped correctly (consult manufacturer specifications).
• Install the new ignition coil, securing it with bolts and reconnecting the electrical connector.

3. Check for Vacuum Leaks

• Visually inspect all vacuum hoses for cracks or disconnections.
• Use a smoke machine or propane torch to detect leaks around the intake manifold.
• If leaks are found, replace the affected hoses or gaskets.

4. Conduct Compression Test

• Remove the spark plug from cylinder 2 and insert the compression tester.
• Crank the engine for a few seconds to obtain a reading.
• Compare the reading to specifications (consult service manual); replace or repair if compression is low.

5. Inspect Fuel Injectors

• Remove the fuel rail (if necessary) to access the fuel injectors.
• Inspect for clogs or leaks and clean or replace injectors as needed.
• Reinstall the fuel rail and ensure proper connections.

6. Reassemble and Reconnect Battery

• Reinstall any components removed during the repair.
• Reconnect the battery and ensure all connections are secure.