how to fix P0301 misfire code in Toyota Camry Eighth Generation (2018-present)?

Solution

1. Preparation

• Gather tools and components.
• Disconnect the negative battery terminal to prevent electrical shock.

Tools Required:

• OBD-II scanner
• Socket set
• Torque wrench
• Multimeter
• Compression tester

2. Replace Spark Plug

1. Remove the engine cover if applicable.
2. Disconnect the ignition coil connector from cylinder 1.
3. Remove the ignition coil by unscrewing the mounting bolts.
4. Extract the spark plug using a spark plug socket.
5. Inspect the old spark plug for signs of wear (e.g., carbon buildup, electrode erosion).
6. Install a new spark plug, ensuring the gap is set to manufacturer's specifications (typically around 0.043 inches for most Toyota engines).
7. Torque the spark plug to the manufacturer’s specifications (usually around 13 lb-ft).

3. Replace Ignition Coil

1. If the spark plug replacement did not resolve the issue, install a new ignition coil.
2. Position the new ignition coil in place and secure it with bolts.
3. Reconnect the ignition coil connector.

4. Inspect and Clean Fuel Injector

1. If misfire persists, remove the fuel injector from cylinder 1.
2. Check the injector for clogs using a fuel injector cleaning kit.
3. Clean the injector with suitable cleaning fluid and reinstall it.

5. Reassemble and Reconnect Battery

1. Reassemble any removed components, including the engine cover.
2. Reconnect the negative battery terminal.