how to fix P0301 cylinder 1 misfire code in Toyota RAV4 XA40 (2013-2018)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to prevent electrical shock.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, dielectric grease.
• Remove the ignition coil from cylinder 1 by unbolting it and pulling it out.
• Remove the spark plug using a spark plug socket.
• Inspect the spark plug for wear; if it's fouled or worn, replace it.
• Apply a small amount of dielectric grease to the tip of the new spark plug.
• Install the new spark plug by hand, then torque it to the manufacturer’s specification (usually around 13-20 lb-ft).
• Reinstall the ignition coil and ensure it is seated properly.

3. Replace Ignition Coil (if necessary)

• Tools Required: Socket set.
• If the ignition coil was found faulty during inspection, remove the coil as described in step 2.
• Install the new ignition coil and secure it with the bolts.
• Reconnect the electrical connector to the ignition coil.

4. Clean or Replace Fuel Injector (if necessary)

• Tools Required: Injector removal tool, fuel line tool.
• Disconnect the fuel supply line and return line if necessary.
• Remove the fuel injector harness connector.
• Remove the fuel injector from the intake manifold.
• Inspect the injector for blockages; clean or replace if needed.
• Reinstall the fuel injector, ensuring it is seated properly, and reconnect the harness.

5. Reconnect Battery

• Reconnect the negative battery terminal securely after all repairs are completed.