how to fix P0301 code in my Toyota Camry XV70 (2018-2024)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety during repairs.
• Allow the engine to cool before starting work.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, spark plug socket, torque wrench, dielectric grease.
• Remove the ignition coil from cylinder 1 by unbolting it.
• Carefully pull the spark plug out using the spark plug socket.
• Inspect the spark plug for signs of wear, carbon buildup, or damage.
• If necessary, replace it with a new spark plug that meets OEM specifications.
• Apply dielectric grease to the tip of the ignition coil before reinstallation for better conductivity.
• Reinstall the ignition coil and tighten to the manufacturer's torque specifications (usually around 10-15 ft-lbs).

3. Check and Replace Ignition Coil (if necessary)

• If the spark plug appears fine, test the ignition coil using a multimeter to ensure it’s functioning correctly.
• If faulty, remove the ignition coil and replace it with a new one, ensuring proper seating and connections.

4. Inspect and Replace Fuel Injector

• Tools Required: Fuel injector removal tool, O-ring lubricant.
• Remove the intake manifold if necessary to access the fuel injector.
• Disconnect the wiring harness and fuel line from the injector.
• Remove the fuel injector from the rail and inspect for clogs or damage.
• Replace the injector with a new one, lubricating the O-rings before reinstallation.
• Reconnect the fuel line and wiring harness.

5. Address Vacuum Leaks

• Inspect all vacuum hoses around the intake manifold for cracks or disconnections.
• Replace any damaged hoses and ensure all connections are secure.