how to fix the P0302 misfire code on my Toyota RAV4 XA50 (2019-2024)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to ensure safety during electrical work.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, dielectric grease
• Remove the engine cover if necessary.
• Locate the spark plug for cylinder 2.
• Use a spark plug socket to remove the old spark plug.
• Inspect and clean the area around the spark plug hole to prevent debris from falling into the cylinder.
• Apply dielectric grease to the new spark plug's threads.
• Install the new spark plug and torque it to the manufacturer's specification (typically around 13-15 lb-ft).
• Reconnect any components removed for access.

3. Inspect and Replace Ignition Coil

• Tools Required: Socket set, multimeter
• Unplug the ignition coil connector for cylinder 2.
• Remove the ignition coil from its mounting by unscrewing it.
• Test the ignition coil with a multimeter according to manufacturer specifications for resistance.
• If faulty, replace with a new ignition coil, ensuring it is seated properly and reconnect the electrical connector.

4. Clean or Replace Fuel Injector

• Tools Required: Fuel injector cleaner or replacement injector, fuel line disconnect tool
• Disconnect the fuel line and electrical connector from the injector.
• Remove the fuel injector using the appropriate tools.
• Clean the injector with appropriate cleaner or replace it with a new one if necessary.
• Reinstall the injector and reconnect the fuel line and electrical connector.

5. Compression Test (if necessary)

• Tools Required: Compression tester
• Remove the spark plug for cylinder 2 and connect the compression tester.
• Crank the engine and record the compression reading.
• Compare the reading to the specifications for the engine. If low, further investigation into internal engine issues may be needed.