how to troubleshoot P0302 misfire code on my Toyota Camry Seventh Generation (2012-2017)

Solution

1. Preparation

• Gather tools and parts needed.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative terminal of the battery.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket
• Remove the ignition coil from cylinder 2.
• Use a spark plug socket to carefully remove the spark plug.
• Inspect the spark plug for wear; replace it with a new one if necessary.
• Torque the new spark plug to the manufacturer’s specification (typically around 13 lb-ft).

3. Replace Ignition Coil (if necessary)

• Disconnect the electrical connector from the ignition coil.
• Remove the mounting bolts holding the ignition coil in place.
• Install the new ignition coil, ensuring it is seated properly.
• Reconnect the electrical connector and torque the bolts to the specified value.

4. Check and Clean Fuel Injector

• Tools Required: Injector cleaning kit (if cleaning is necessary)
• Remove the fuel injector from cylinder 2.
• Inspect the injector for clogs; clean it if necessary or replace it with a new one.
• Reinstall the injector, ensuring proper seating and connection.

5. Reassemble Components

• Reinstall the ignition coil and spark plug.
• Reconnect the negative battery terminal.
• Start the engine and check for smooth operation.