how to fix P0302 misfire code in my Volvo XC60 First Generation (2008-2017)

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, compression tester, multimeter, noid light.
• Disconnect the battery to ensure safety while working on electrical components.

2. Inspect and Replace Spark Plug

• Remove the ignition coil from cylinder 2.
• Unscrew the spark plug using a spark plug socket.
• Inspect the spark plug for signs of wear or damage (e.g., fouling, cracking).
• If necessary, replace the spark plug with a new one, using the specified gap for the Volvo XC60 (typically around 0.028 inches).
• Reinstall the ignition coil and reconnect it.

3. Test and Replace Ignition Coil (if needed)

• Use a multimeter to test the resistance of the ignition coil. Compare readings with specifications in the service manual.
• If the ignition coil is faulty, remove it and replace it with a new one.
• Reconnect the ignition coil to the wiring harness.

4. Check Fuel Injector

• Remove the fuel injector connector for cylinder 2.
• Use a noid light to check for proper signal to the injector.
• If the injector does not receive a signal, check the wiring and connectors for damage.
• If the injector is faulty, remove it and replace it with a new one, ensuring to use the correct O-rings and seals.

5. Perform Compression Test

• Remove the spark plug from cylinder 2.
• Insert the compression tester into the spark plug hole.
• Crank the engine and record the compression reading.
• Compare the reading to specified values in the service manual. If low, further diagnostics may be needed for valve or piston issues.