how to fix P0302 misfire code on my Toyota RAV4 Fourth Generation (2013-2018)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to ensure safety during the process.

2. Replace Spark Plug (if necessary)

• Sub-steps:
  1. Remove the engine cover (if applicable) using a socket set.
  2. Locate the spark plug in cylinder 2.
  3. Use a spark plug socket and ratchet to remove the old spark plug.
  4. Inspect the old spark plug for signs of wear or damage.
  5. Install a new spark plug, ensuring it is gapped correctly (typically 0.043 inches for Toyota).
  6. Torque the spark plug to the manufacturer's specification (usually around 13 lb-ft).

3. Replace Ignition Coil (if necessary)

• Sub-steps:
  1. Disconnect the electrical connector from the ignition coil on cylinder 2.
  2. Remove the coil by unscrewing the retaining bolt using a socket set.
  3. Install the new ignition coil, ensuring it is seated properly.
  4. Reconnect the electrical connector.

4. Inspect and Clean Fuel Injector (if necessary)

• Sub-steps:
  1. Remove the fuel rail (ensure fuel pressure is relieved before starting).
  2. Remove the fuel injector from cylinder 2.
  3. Clean the injector using a fuel injector cleaner or replace it if damaged.
  4. Reinstall the injector and ensure it is seated correctly in the fuel rail.

5. Perform Compression Test (if necessary)

• Sub-steps:
  1. Remove the spark plug from cylinder 2.
  2. Insert the compression tester into the spark plug hole.
  3. Crank the engine for a few seconds and record the compression reading.
  4. Compare the reading to manufacturer specifications (typically around 180 psi for a healthy engine).
  5. If compression is low, further engine diagnostics may be required.