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

Solution

1. Preparation

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

2. Replace Spark Plug

• Tools Required: Socket set, spark plug socket, torque wrench
• Remove the ignition coil for cylinder 1 by unbolting it and disconnecting the electrical connector.
• Use a spark plug socket to remove the old spark plug.
• Inspect the spark plug for wear or fouling. Replace if necessary.
• Install the new spark plug, torqueing it to the manufacturer’s specification (typically 13 lb-ft).
• Reattach the ignition coil, ensuring the connector is secure.

3. Inspect/Replace Ignition Coil

• If the spark plug replacement did not resolve the issue, test the ignition coil for cylinder 1.
• If faulty, remove the ignition coil from cylinder 1.
• Replace with a new ignition coil, ensuring proper seating and connection.

4. Check/Replace Fuel Injector

• If misfire persists, check the fuel injector for cylinder 1.
• Disconnect the fuel injector connector and remove the fuel rail as necessary.
• Inspect the injector for clogs or leaks.
• Replace the fuel injector if it is defective.

5. Compression Test

• If all previous components are functioning, conduct a compression test on cylinder 1.
• If compression is low, further investigation may be necessary for internal engine issues such as valve problems or head gasket failures.