how do I fix P0300 misfire code in my Toyota Camry Seventh Generation (2012-2017)

Solution

1. Preparation

• Gather tools and parts required.
• Disconnect the battery to prevent electrical shorts.
• Allow the engine to cool before starting work.

2. Inspect and Replace Spark Plugs

• Remove the engine cover (if applicable).
• Use a spark plug socket to remove the spark plugs from each cylinder.
• Inspect the condition of the spark plugs (check for fouling, wear, or deposits).
• Replace with new spark plugs (ensure they meet OEM specifications).
• Torque the new spark plugs to 13 lb-ft (17.6 Nm).

3. Check and Replace Ignition Coils

• Disconnect the electrical connectors from each ignition coil.
• Remove the ignition coils using a socket set.
• Inspect for any signs of damage, such as cracks or corrosion.
• Replace faulty ignition coils with OEM parts.
• Reinstall the ignition coils and reconnect the electrical connectors.

4. Inspect Fuel Injectors

• Remove the fuel rail if necessary for access (relieve fuel pressure first).
• Inspect the fuel injectors for clogs or leaks.
• Clean or replace fuel injectors as needed.
• Reinstall the fuel rail and ensure all connections are secure.

5. Perform Compression Test

• Remove the spark plugs to access the cylinders.
• Insert a compression gauge into each cylinder and crank the engine.
• Record the compression readings and compare them against the manufacturer's specifications.
• If readings are low, investigate further for potential internal engine issues (head gasket, valves, etc.).