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

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool before starting work.

2. Inspect and Replace Spark Plug

1. Remove the engine cover if applicable.
2. Disconnect the ignition coil connector from cylinder 2.
3. Unbolt and remove the ignition coil from cylinder 2.
4. Remove the spark plug using a spark plug socket and ratchet.
5. Inspect the spark plug for signs of wear or fouling; replace if necessary.
6. Install a new spark plug, ensuring it is gapped correctly (typically around 0.043 inches).
7. Reinstall the ignition coil and secure it with bolts.
8. Reconnect the ignition coil connector.

3. Check and Replace Ignition Coil (if needed)

1. If the ignition coil was found defective during inspection, remove it as described above.
2. Install a new ignition coil for cylinder 2.
3. Reconnect the ignition coil connector.

4. Inspect and Clean Fuel Injector

1. If fuel injector issues are suspected, access the fuel rail by removing necessary components.
2. Disconnect the fuel injector connector from cylinder 2.
3. Remove the fuel injector from the fuel rail.
4. Clean the injector using a specialized fuel injector cleaning kit or replace it if necessary.
5. Reinstall the fuel injector and reconnect the injector connector.

5. Final Assembly

1. Reinstall any components removed for access.
2. Reconnect the negative battery terminal.
3. Start the engine and allow it to reach operating temperature.