how to fix P0301 misfire code in Toyota Camry Seventh Generation (2012-2017)

Solution

1. Preparation

• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Gather necessary tools and parts.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, dielectric grease.
• Remove the ignition coil from cylinder 1 by unscrewing the mounting bolts and disconnecting the electrical connector.
• Remove the spark plug using a socket wrench. Inspect the spark plug for wear, fouling, or damage.
• Replace with a new spark plug, ensuring the gap is set to manufacturer specifications (typically around 0.043 inches for most Toyota models).
• Apply a small amount of dielectric grease to the spark plug boot before reinstallation.

3. Inspect and Replace Ignition Coil

• Tools Required: Socket set.
• If the spark plug is in good condition, inspect the ignition coil for cracks or carbon tracking.
• Replace the ignition coil if damaged. Install the new coil and reconnect the electrical connector securely.

4. Check and Clean Fuel Injector

• Tools Required: Fuel injector cleaner, cleaning kit (if needed).
• Inspect the fuel injector for debris or clogs. Use a fuel injector cleaner to clean the injector or replace it if necessary.
• Ensure the injector is seated properly and reconnect any fuel lines as necessary.

5. Final Assembly

• Reinstall the ignition coil and ensure all connections are secure.
• Reconnect the negative battery terminal.
• Start the engine and let it idle to ensure that the misfire code has cleared.