how to fix P0301 misfire code on my Toyota Camry Eighth Generation (2018-present)

Solution

1. Preparation

• Gather tools and components before starting.
• Ensure the vehicle is on a flat surface and the engine is cool.
• Disconnect the battery to prevent electrical shock.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket, anti-seize compound.
• Remove the engine cover if applicable.
• Remove the ignition coil by unscrewing the mounting bolts.
• Disconnect the electrical connector from the ignition coil.
• Remove the old spark plug using the spark plug socket.
• Inspect the spark plug for wear; if damaged, replace with the manufacturer's recommended spark plug.
• Apply anti-seize compound to the threads of the new spark plug and install it to the specified torque (typically around 13-15 ft-lbs).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Replace Ignition Coil (if faulty)

• Tools Required: Socket set, torque wrench.
• If the ignition coil was damaged or showed signs of failure during inspection, remove it as described above.
• Install a new ignition coil, ensuring it matches the specifications for the Camry.
• Torque the mounting bolts to the manufacturer’s specifications (usually around 80-100 in-lbs).

4. Replace Fuel Injector (if necessary)

• Tools Required: Fuel injector removal tool, safety glasses, shop towels.
• Prepare the area by relieving fuel pressure according to the manufacturer’s procedure.
• Disconnect the fuel line from the injector and remove any retaining clips.
• Remove the fuel injector from the rail.
• Install a new fuel injector with new O-rings. Ensure it is seated properly.
• Reattach the fuel line and ensure all connections are secure.

5. Reassemble and Reconnect Battery

• Reinstall any components removed during the repair.
• Reconnect the battery terminals, ensuring they are tight and secure.