how to fix P0301 misfire code on Toyota RAV4 Fourth Generation (2013-2018)

Solution

1. Preparation

• Gather tools and parts required.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shocks.

2. Replace Spark Plug

• Tools Required: Spark plug socket, ratchet, torque wrench
• Remove the ignition coil from cylinder 1 by unscrewing the mounting bolt and pulling it out.
• Use the spark plug socket to remove the old spark plug from cylinder 1.
• Inspect the old spark plug for signs of fouling or damage.
• Install a new spark plug, ensuring it is gapped correctly (typically between 0.043 to 0.047 inches).
• Torque the spark plug to the manufacturer's specifications (usually around 13 lb-ft).

3. Replace Ignition Coil

• Tools Required: Socket set
• If the ignition coil is suspected to be faulty, remove the coil from cylinder 1 by unscrewing it.
• Install the new ignition coil and secure it with the mounting bolt.
• Reconnect the electrical connector to the ignition coil.

4. Clean or Replace Fuel Injector

• Tools Required: Injector cleaning kit (if cleaning), or a socket set (if replacing)
• If the fuel injector is clogged, remove the fuel injector from cylinder 1.
• Clean it using an appropriate injector cleaning solution or replace it with a new injector.
• Reinstall the cleaned or new fuel injector into cylinder 1 and secure it.

5. Reassemble and Reconnect

• Reattach the ignition coil and any wiring harnesses you may have disconnected.
• Reconnect the negative battery terminal.