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

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety while working on the vehicle.

2. Access Cylinder 1 Components

• Remove the engine cover (if equipped) using a socket set.
• Locate Cylinder 1 (typically the first cylinder on the passenger side in a 4-cylinder engine).

3. Replace Spark Plug

• Tools Required: Spark plug socket, torque wrench.
• Remove the spark plug wire or ignition coil from Cylinder 1.
• Use a spark plug socket to carefully unscrew the old spark plug.
• Inspect the old spark plug for wear (carbon buildup, burnt tips).
• Install the new spark plug by hand to avoid cross-threading, then torque to the manufacturer's specification (typically around 13-15 lb-ft).

4. Inspect and Replace Ignition Coil (if necessary)

• Tools Required: Socket set.
• Remove the ignition coil mounting bolts and carefully lift the coil out.
• Inspect for cracks or carbon tracking.
• If damaged, replace with a new ignition coil, ensuring it seats properly and reconnect the wiring harness.

5. Check and Clean Fuel Injector

• If misfire persists, consider cleaning or replacing the fuel injector for Cylinder 1.
• Disconnect the fuel injector connector and remove the mounting bolts.
• Use a fuel injector cleaner or replace the injector if necessary.

6. Reassemble and Reconnect

• Reinstall any removed components in reverse order.
• Reconnect the negative battery terminal.