how to fix a 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

• Gather tools and parts.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool before starting work.

2. Inspect and Replace Spark Plug

• Tools Required: Spark plug socket, ratchet, torque wrench, gap tool
• Remove the ignition coil from cylinder 2 by unscrewing the retaining bolts.
• Pull the ignition coil straight out to avoid damage.
• Remove the spark plug using a spark plug socket.
• Inspect the spark plug for wear or damage. If necessary, replace it with a new spark plug, ensuring it is gapped correctly according to manufacturer specifications (consult owner’s manual).
• Reinstall the spark plug and torque to the manufacturer’s specification (typically around 13-20 lb-ft).
• Reinstall the ignition coil and secure it with bolts.

3. Inspect and Replace Ignition Coil (if necessary)

• If the spark plug is in good condition but misfire persists, replace the ignition coil for cylinder 2.
• Disconnect the electrical connector from the ignition coil.
• Remove the ignition coil and install the new one.
• Reconnect the electrical connector securely.

4. Check and Replace Fuel Injector

• Tools Required: Noid light or multimeter
• Disconnect the electrical connector from the fuel injector for cylinder 2.
• Use a noid light to check for injector pulse; if there's no pulse, inspect wiring and connectors.
• If the injector is faulty, remove it and install a new injector, ensuring proper seating and connection.

5. Compression Test (if misfire continues)

• Tools Required: Compression gauge
• Remove the spark plug for cylinder 2.
• Insert the compression gauge into the spark plug hole.
• Crank the engine and note the compression reading; it should be within the manufacturer’s specified range.
• If compression is low, further engine diagnostics may be necessary.