how to fix P0301 code on my Toyota RAV4 XA50 (2019-2024)

Solution

1. Preparation

• Gather tools and materials: OBD-II scanner, socket set, torque wrench, compression tester, multimeter, replacement spark plug and ignition coil (if needed).
• Ensure the vehicle is on a flat surface and the engine is cool.

2. Replace Spark Plug

1. Remove the ignition coil cover if applicable.
2. Disconnect the ignition coil connector from the coil on cylinder 1.
3. Remove the ignition coil by unscrewing it with a socket.
4. Remove the old spark plug using a spark plug socket.
5. Inspect the spark plug for wear; replace if necessary.
6. Install the new spark plug, ensuring it is torqued to manufacturer specifications (typically around 13-15 lb-ft).
7. Reinstall the ignition coil and reconnect the connector securely.

3. Replace Ignition Coil (if necessary)

1. If the ignition coil was found faulty during inspection, proceed with replacement.
2. Remove the faulty ignition coil from cylinder 1 as described in the previous step.
3. Install the new ignition coil and ensure it is seated properly.
4. Reconnect the ignition coil connector.

4. Clean or Replace Fuel Injector (if necessary)

1. If the fuel injector was found to be malfunctioning, disconnect the fuel injector connector.
2. Remove the fuel rail (if required) to access the injector.
3. Clean the injector using a suitable cleaning solvent or replace it with a new one.
4. Reinstall the fuel rail and reconnect the fuel injector connector.

5. Final Checks

1. Reconnect the battery if it was disconnected.
2. Start the engine and check for any pending codes using the OBD-II scanner.
3. Monitor the engine for misfires and ensure it runs smoothly.