how to troubleshoot a Volvo XC60 First Generation (2008-2017) with a P0302 code

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 necessary tools and parts.
• Disconnect the battery to prevent electrical shorts. Allow the engine to cool before working on it.

2. Replace Ignition Coil

• Tools Required: Socket set, torque wrench
• Remove the engine cover if necessary.
• Unplug the electrical connector from the ignition coil for cylinder 2.
• Remove the retaining bolt(s) and carefully pull the ignition coil out of the spark plug well.
• Install the new ignition coil and torque the retaining bolt to the manufacturer's specifications (typically around 90-100 in-lbs).
• Reconnect the electrical connector.

3. Replace Spark Plug

• Tools Required: Socket set, spark plug socket, torque wrench
• Using a spark plug socket, remove the spark plug from cylinder 2.
• Inspect the old plug for wear, carbon buildup, or damage.
• Install the new spark plug by hand to avoid cross-threading, then use a torque wrench to tighten it to the manufacturer's specification (usually around 13-15 ft-lbs).
• Reattach any components removed to access the spark plug.

4. Test Fuel Injector

• Tools Required: Multimeter or noid light
• Disconnect the fuel injector connector for cylinder 2.
• Use a multimeter to check for voltage at the connector while cranking the engine, or connect a noid light to verify injector pulse.
• If no voltage or pulse is detected, investigate further back to the ECM or wiring harness.

5. Perform Compression Test

• Tools Required: Compression tester
• Remove spark plug from cylinder 2.
• Insert the compression tester into the spark plug hole and crank the engine.
• Record the compression reading and compare it to specifications (typically around 150-200 psi).
• If readings are low, further investigation into the cylinder's valve and piston condition is necessary.