how to fix the P0301 code in my Toyota RAV4 Fifth Generation (2019-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety while working on electrical components.
• Allow the engine to cool before starting.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket, dielectric grease.
• Remove the engine cover if applicable.
• Disconnect the ignition coil connector for cylinder 1.
• Remove the ignition coil using the socket set.
• Remove the spark plug with the spark plug socket.
• Inspect the spark plug for wear; replace if worn or fouled.
• Apply dielectric grease to the boots of the new ignition coil before installation.
• Install the new spark plug, ensuring to torque to specifications (typically 13-15 lb-ft).
• Reinstall the ignition coil and connect the wiring harness.

3. Inspect and Replace Ignition Coil (if necessary)

• If the ignition coil shows signs of damage or failure during inspection, replace it:
  • Remove the ignition coil as described above.
  • Install the new ignition coil, ensuring it is seated correctly.
  • Reconnect the ignition coil connector.

4. Fuel Injector Inspection

• Tools Required: Fuel pressure gauge (optional), fuel injector cleaning kit.
• Check the fuel injector for cylinder 1.
• If necessary, use a fuel injector cleaning kit to clean the injector.
• Reinstall the injector, ensuring it is properly seated and connected.

5. Check and Repair Vacuum Leaks

• Inspect all vacuum hoses for cracks or disconnections.
• Replace any damaged hoses.
• Recheck the intake manifold for proper sealing and tighten any loose bolts.