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

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the engine is cool before starting work.
• Disconnect the battery to prevent electrical shorts.

2. Replace Spark Plug

1. Locate the spark plug for cylinder 2 (refer to the vehicle’s service manual for location).
2. Use a spark plug socket and ratchet to remove the old spark plug.
3. Inspect the spark plug for wear and carbon buildup; replace if necessary.
4. Apply anti-seize compound to the threads of the new spark plug.
5. Torque the new spark plug to the manufacturer’s specifications (typically around 13-16 lb-ft).

3. Replace Ignition Coil

1. Disconnect the electrical connector from the ignition coil for cylinder 2.
2. Remove the retaining bolts and lift the ignition coil from the spark plug well.
3. Install the new ignition coil, ensuring it seats properly.
4. Reconnect the electrical connector securely.

4. Inspect and Clean Fuel Injector

1. Remove the fuel injector connector and the fuel rail bolts.
2. Carefully detach the fuel rail from the intake manifold.
3. Remove the injector for cylinder 2 from the rail.
4. Clean the injector using a fuel injector cleaner or replace it if it is clogged.
5. Reinstall the injector into the rail and reattach the fuel rail to the manifold.

5. Perform Compression Test (if necessary)

1. Remove the spark plug for cylinder 2.
2. Insert the compression gauge into the spark plug hole.
3. Crank the engine several times and record the compression reading.
4. Compare the reading to specifications; if low, further investigation is needed into engine internals.