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

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the vehicle battery to ensure safety.
• Allow the engine to cool down before working on it.

2. Replace Spark Plug

• Tools Required: Socket set, spark plug socket, torque wrench.
• Remove the ignition coil from cylinder 1 by unfastening any retaining screws and disconnecting the electrical connector.
• Remove the spark plug using a spark plug socket and ratchet.
• Inspect the old spark plug for signs of wear or damage; replace if necessary.
• Install the new spark plug, tightening it to the manufacturer’s specified torque (typically around 13-16 lb-ft for most Toyota models).
• Reinstall the ignition coil and connect the electrical connector.

3. Replace Ignition Coil

• Tools Required: Socket set, torque wrench.
• If the ignition coil was found defective during diagnostics, remove it from cylinder 1.
• Install the new ignition coil, ensuring it is seated properly.
• Torque the retaining screws to the manufacturer's specifications.

4. Fuel Injector Inspection/Replacement

• Tools Required: Fuel injector removal tool, socket set.
• If fuel injector issues were suspected, remove the fuel rail to access the injector for cylinder 1.
• Inspect the fuel injector for clogs or leaks. If faulty, replace it with a new one.
• Reinstall the fuel rail and ensure all connections are secure.