how to fix P0302 misfire code on my Toyota RAV4 Fourth Generation (2013-2018)

Solution

1. Preparation

• Gather necessary tools and parts before starting.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the battery to avoid electrical shorts.

2. Inspect and Replace Spark Plug

1. Remove the engine cover if necessary (use a socket set).
2. Disconnect the ignition coil connector for cylinder 2.
3. Unscrew and remove the ignition coil using a socket wrench.
4. Remove the spark plug using a spark plug socket.
5. Inspect the spark plug for wear or fouling and replace it with a new one (specify the gap if necessary).
6. Reinstall the ignition coil and reconnect the connector.

3. Inspect and Replace Ignition Coil

1. If the ignition coil appears damaged, proceed to replace it.
2. Remove the old ignition coil and install the new one.
3. Reconnect the ignition coil connector.
4. Ensure all connections are secure.

4. Test Fuel Injector

1. If the misfire persists, check the fuel injector for cylinder 2.
2. Disconnect the fuel injector connector.
3. Use a multimeter to test the injector's resistance; it should match the manufacturer's specifications.
4. If faulty, replace the fuel injector and reconnect the connector.

5. Compression Test (if needed)

1. Remove the spark plug from cylinder 2.
2. Insert the compression tester into the spark plug hole.
3. Crank the engine to take a reading; compare it against specifications.
4. If compression is low, further investigation for internal engine issues is required.

Tools Required:

• OBD-II scanner
• Socket set
• Spark plug socket
• Multimeter
• Compression tester

Parts Required:

• Spark plug (specific to vehicle)
• Ignition coil (if needed)
• Fuel injector (if needed)

Estimated Repair Time: 2-4 hours

Safety Warnings:

• Disconnect the battery before working on electrical systems.
• Allow engine to cool before opening any components.