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

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Ensure the vehicle is parked on a level surface, and the engine is cool before starting.
• Disconnect the negative battery terminal to avoid electrical shorts.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the ignition coil from cylinder 1 by unscrewing the retaining bolts.
• Carefully pull out the spark plug using the spark plug socket.
• Install the new spark plug, ensuring it is gapped correctly (typically 0.043 inches for most Toyota engines).
• Torque the spark plug to the manufacturer's specification (usually around 13 lb-ft).
• Reinstall the ignition coil and secure it with the bolts.

3. Inspect or Replace Ignition Coil

• Tools Required: Socket set, multimeter (for testing).
• If the ignition coil appears damaged, test it with a multimeter according to the manufacturer's specifications.
• If faulty, replace the ignition coil with a new one, ensuring it is seated properly.

4. Clean or Replace Fuel Injector

• Tools Required: Fuel injector cleaning kit or new fuel injector.
• Remove the fuel injector from cylinder 1 by disconnecting the electrical connector and fuel line.
• If cleaning, follow the injector cleaning kit instructions. If replacement is necessary, install the new injector ensuring proper seating and connection.

5. Check Compression

• Tools Required: Compression tester.
• Remove the spark plug again and insert the compression tester into cylinder 1.
• Crank the engine to take the reading; compare it to the manufacturer's specifications.
• If compression is low, further diagnostics may be needed for internal engine repairs.