how to fix P0300 code on Toyota Camry Eighth Generation (2018-present)

Solution

1. Preparation

• Gather tools and parts.
• Disconnect the battery to prevent electrical shock.
• Allow the engine to cool before beginning work.

2. Inspect and Replace Spark Plugs

• Tools Required: Spark plug socket, ratchet, torque wrench, dielectric grease.
• Remove the ignition coils by unbolting them and disconnecting the electrical connectors.
• Remove the spark plugs using the spark plug socket.
• Inspect spark plugs for signs of wear or fouling. Replace with OEM specifications if necessary.
• Apply dielectric grease to the spark plug threads and reinsert them, torquing to manufacturer specifications (typically 13-16 lb-ft).

3. Inspect and Replace Ignition Coils

• Tools Required: Socket set, ratchet.
• Inspect the ignition coils for cracks or signs of arcing.
• Replace any faulty ignition coils by removing the mounting bolts and electrical connectors.
• Install the new ignition coils and secure them properly.

4. Check and Replace Fuel Injectors (if necessary)

• Tools Required: Fuel injector puller, socket set.
• Remove the fuel rail to access the injectors.
• Inspect the injectors for clogs or leaks. Clean or replace them as needed.
• Reassemble the fuel rail and ensure all connections are secure.

5. Clear the Codes

• Reconnect the battery and use the OBD-II scanner to clear the P0300 code.
• Start the engine and let it run for a few minutes to verify that the check engine light does not return.