how to diagnose my Toyota Camry XV70 (2018-2024) misfire code P0302

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to avoid electrical shocks.
• Allow the engine to cool completely before beginning work.

2. Replace Spark Plug

• Remove the engine cover if applicable.
• Carefully disconnect the ignition coil connector.
• Remove the ignition coil bolt and take out the ignition coil.
• Unscrew the spark plug using a spark plug socket.
• Inspect the old spark plug; if worn or fouled, replace it with a new one (OEM recommended).
• Install the new spark plug with the manufacturer-recommended torque (typically around 13-15 lb-ft).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Test and Replace the Ignition Coil (if necessary)

• If the ignition coil showed signs of damage or did not meet resistance specifications, replace it with a new one.
• Install the new ignition coil securely and reconnect the electrical connector.

4. Clean or Replace Fuel Injector (if necessary)

• If the fuel injector was found to be faulty, remove it using a fuel injector removal tool.
• Clean the injector using an ultrasonic cleaner or replace it with a new one.
• Reinstall the fuel injector and ensure it is seated properly.

5. Reassemble and Start Engine

• Reinstall any components that were removed, including the engine cover if applicable.
• Reconnect the negative battery terminal.
• Start the engine and check for any abnormal noises or warning lights.