how to fix P0301 misfire code in a Toyota Camry XV50 (2012-2017)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to prevent electrical shorts.
• Allow the engine to cool before starting any repairs.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Instructions:
  1. Remove the engine cover if necessary.
  2. Disconnect the ignition coil connector on cylinder 1.
  3. Remove the ignition coil from cylinder 1.
  4. Using a spark plug socket, remove the old spark plug from cylinder 1.
  5. Inspect the new spark plug for proper gap (0.043 inches for most applications).
  6. Install the new spark plug and torque to manufacturer specifications (15 ft-lbs).
  7. Reinstall the ignition coil and reconnect the electrical connector.

3. Replace Ignition Coil (if necessary)

• Tools Required: Socket set, torque wrench.
• Instructions:
  1. If the ignition coil showed improper resistance, remove it from cylinder 1.
  2. Install the new ignition coil and torque to manufacturer specifications (8-10 ft-lbs).
  3. Reconnect the ignition coil connector.

4. Clean or Replace Fuel Injector (if necessary)

• Tools Required: Fuel injector cleaner or replacement injector, fuel line disconnect tool.
• Instructions:
  1. Disconnect the fuel line and electrical connector from the fuel injector.
  2. Use a fuel injector cleaner or replace the injector if it is faulty.
  3. Reinstall the fuel injector and reconnect the fuel line and electrical connector.

5. Final Assembly

• Reinstall any engine covers removed during the process.
• Reconnect the battery.