how to fix the P0302 misfire code on my Toyota RAV4 Fifth Generation (2019-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool down before beginning work.

2. Replace Spark Plug

• Remove the ignition coil from cylinder 2 by unscrewing any retaining bolts and disconnecting the electrical connector.
• Remove the spark plug using a spark plug socket and ratchet.
• Inspect the old spark plug for signs of wear or fouling.
• Install a new spark plug, ensuring it is gapped correctly according to the manufacturer's specifications (typically around 0.043 inches).
• Reattach the ignition coil to cylinder 2.

3. Inspect and Replace Ignition Coil

• If the ignition coil appears damaged, remove it from the cylinder.
• Install a new ignition coil, ensuring it is seated properly and the electrical connector is secured.

4. Check Fuel Injector

• If the injector is suspected to be faulty, remove the fuel injector from cylinder 2.
• Inspect the injector for clogs or damage. Clean it if necessary, or replace it with a new one if it’s defective.
• Reinstall the fuel injector and ensure all connections are secure.

5. Reassemble and Test

• Reconnect the negative battery terminal.
• Start the engine and allow it to idle to check for any further misfire codes.
• Conduct a test drive to ensure the issue is resolved.