what does a P0301 code mean for my Toyota Camry XV70 (2018-2024)?

Solution

1. Preparation

• Gather tools and parts required for repairs.
• Ensure the vehicle is parked on a level surface and the engine is cool.

2. Replace Spark Plug

1. Disconnect the negative battery terminal.
2. Remove the ignition coil from cylinder 1 by unscrewing the bolts and disconnecting the electrical connector.
3. Using a spark plug socket, remove the spark plug from cylinder 1.
4. Inspect the old spark plug; if it’s worn or fouled, replace it with a new spark plug, ensuring it matches the manufacturer’s specifications.
5. Reinstall the spark plug and torque it to the manufacturer’s specifications.

3. Inspect and Replace Ignition Coil

1. If the ignition coil is found defective, replace it by removing the old coil from cylinder 1.
2. Install a new ignition coil, ensuring it is seated properly and the electrical connector is secure.
3. Reconnect the negative battery terminal.

4. Check Fuel Injector

1. If the fuel injector is suspected, remove it from cylinder 1.
2. Clean or replace the fuel injector as necessary.
3. Reinstall the fuel injector and ensure all connections are secure.

5. Conduct Compression Test

1. If misfire persists, perform a compression test on cylinder 1.
2. Record compression readings; if compression is low, further investigation into mechanical issues may be necessary.