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

Solution

1. Preparation

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

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket
• Remove the ignition coil from cylinder 1 by unbolting it and disconnecting the electrical connector.
• Remove the spark plug using a spark plug socket.
• Inspect the spark plug for wear or fouling; replace if necessary.
• Install the new spark plug and torque it to manufacturer specifications (typically around 13-16 lb-ft).
• Reinstall the ignition coil.

3. Check and Replace Ignition Coil

• Tools Required: Socket set, multimeter (for testing)
• If the ignition coil seems faulty during inspection, replace it with a new one.
• Test the new ignition coil with a multimeter to ensure it has the correct resistance.
• Install the new ignition coil onto cylinder 1 securely.

4. Inspect and Clean Fuel Injector

• Tools Required: Fuel injector cleaning kit or a new fuel injector
• Remove the fuel injector from cylinder 1.
• Inspect it for clogs or damage; clean it with a fuel injector cleaner or replace it if necessary.
• Reinstall the cleaned or new fuel injector, ensuring proper sealing.

5. Verify Engine Timing

• Tools Required: Timing light
• Connect the timing light to the battery and the number 1 cylinder spark plug wire.
• Check the timing against manufacturer specifications (usually found in the service manual).
• If timing is off, adjust it accordingly.