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

Solution

1. Preparation

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

2. Inspect and Replace Spark Plug

• Remove the engine cover (if applicable) to access the spark plugs.
• Use a socket wrench to remove the spark plug for cylinder 1.
• Inspect the spark plug for wear or carbon deposits.
• If necessary, replace with a new spark plug that meets OEM specifications (typically iridium for this model).
• Torque the new spark plug to the manufacturer’s specified value (usually around 13 ft-lbs).

3. Inspect and Replace Ignition Coil

• Disconnect the electrical connector from the ignition coil for cylinder 1.
• Remove the mounting bolts holding the ignition coil in place.
• Replace the ignition coil with a new one that meets OEM specifications.
• Reattach the electrical connector and ensure it clicks into place.

4. Check Fuel Injector

• Disconnect the fuel injector connector for cylinder 1.
• Use a multimeter to check for proper voltage and pulse; replace if faulty.
• If the injector is clean, reattach the connector.

5. Inspect for Vacuum Leaks

• Visually inspect and feel around all vacuum hoses connected to the intake manifold for any cracks or disconnections.
• Use a smoke machine or propane to locate any leaks if necessary; seal or replace any faulty hoses.

6. Compression Test

• Perform a compression test on cylinder 1 using a compression tester.
• If compression is below specifications (usually around 180 psi), further engine diagnostics may be required.