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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Ensure the engine is cool before beginning work.

2. Inspect and Replace Spark Plug

• Remove the ignition coil from cylinder 2:
  • Unscrew the retaining bolt with a socket wrench.
  • Carefully pull the ignition coil out of the spark plug well.
• Remove the spark plug using a spark plug socket:
  • Inspect the spark plug for wear or damage.
  • If necessary, replace with a new spark plug (OEM recommended).
• Reinstall the spark plug and ignition coil:
  • Torque the spark plug to the manufacturer's specification (usually around 13 lb-ft).
  • Reattach the ignition coil and secure it with the retaining bolt.

3. Inspect and Replace Ignition Coil (if needed)

• Test the ignition coil for cylinder 2 using an ohmmeter:
  • Compare readings with manufacturer specifications.
• If the ignition coil is faulty, replace it with a new one:
  • Install the new ignition coil in the same manner as above.

4. Inspect and Clean Fuel Injector

• Remove the fuel injector for cylinder 2:
  • Disconnect the electrical connector and fuel line (use caution as fuel may spill).
  • Unscrew the injector from the intake manifold.
• Clean the fuel injector using a specialized fuel injector cleaner or replace it if clogged.
• Reinstall the fuel injector and reconnect the fuel line and electrical connector.

5. Conduct a Compression Test

• If misfire persists, perform a compression test on all cylinders:
  • Remove spark plugs and connect the compression tester to cylinder 2.
  • Crank the engine and record the readings.
• If compression is low, further investigation is required for potential valve or head gasket issues.