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

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative terminal of the battery to prevent electrical shock.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the engine cover if applicable.
• Disconnect the ignition coil connector on cylinder 1.
• Remove the ignition coil by unscrewing the bolts.
• Extract the spark plug using the spark plug socket.
• Inspect the old spark plug for wear; replace if necessary.
• Install the new spark plug, torquing to the manufacturer’s specification (typically around 13 lb-ft).
• Reinstall the ignition coil and reconnect the connector.

3. Replace Ignition Coil (if needed)

• If the ignition coil is found to be faulty during inspection, replace it.
• Tools Required: Socket set.
• Remove the ignition coil as described above.
• Install the new ignition coil and secure it with bolts.
• Reconnect the connector.

4. Clean or Replace Fuel Injector (if needed)

• If the fuel injector is clogged, clean or replace it.
• Tools Required: Fuel injector cleaning kit or new fuel injector.
• Disconnect the fuel line and electrical connector from the injector.
• Remove the fuel injector from the rail.
• Clean with an appropriate injector cleaner or replace with a new injector.
• Reinstall the fuel injector and reconnect the fuel line and electrical connector.

5. Check for Vacuum Leaks

• Inspect all vacuum hoses and connections around the intake manifold.
• Use a smoke machine or carburetor cleaner to check for leaks while the engine is running.
• Repair or replace any damaged hoses or gaskets.