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

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool down before starting work.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket, dielectric grease.
• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Locate the spark plug for cylinder 1 (refer to the engine layout).
  3. Using the spark plug socket, carefully remove the old spark plug.
  4. Inspect the spark plug socket and clean if necessary.
  5. Install the new spark plug and torque it to the manufacturer’s specification (typically around 13-15 lb-ft).
  6. Apply dielectric grease to the spark plug boot before re-installation.

3. Replace Ignition Coil

• Tools Required: Socket set, torque wrench.
• Sub-steps:
  1. Disconnect the electrical connector from the ignition coil.
  2. Remove the mounting bolts securing the ignition coil and take out the old coil.
  3. Install the new ignition coil and secure it with the mounting bolts (torque to manufacturer specifications).
  4. Reconnect the electrical connector to the ignition coil.

4. Test Fuel Injector

• Tools Required: Multimeter, injector cleaning kit (if needed).
• Sub-steps:
  1. Disconnect the fuel injector connector for cylinder 1.
  2. Use a multimeter to check the resistance of the fuel injector (should typically be between 12-16 ohms).
  3. If the resistance is out of specification, replace the injector.
  4. Clean the injector if necessary, or replace it with a new one.