how to fix P0302 code on my Toyota RAV4 XA40 (2013-2018)

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, compression tester, multimeter, fuel injector cleaning kit.
• Clear any existing codes using the OBD-II scanner after taking note of them for future reference.
• Ensure the vehicle is parked on a level surface and the engine is cool.

2. Inspect and Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Disconnect the ignition coil connector for cylinder 2.
  3. Unscrew and remove the ignition coil using a socket set.
  4. Remove the spark plug using a spark plug socket.
  5. Inspect the spark plug for wear or fouling; replace if necessary.
  6. Install the new spark plug and torque it to the manufacturer’s specification (typically around 13-16 ft-lbs).
  7. Reinstall the ignition coil and reconnect the connector.

3. Check and Replace Ignition Coil

• Sub-steps:
  1. If the spark plug was fine, test the ignition coil with a multimeter for resistance (consult specifications, typically around 0.5-1.5 ohms for primary).
  2. If the coil is faulty, replace it with a new one.
  3. Reconnect the ignition coil and ensure it is seated properly.

4. Fuel Injector Inspection and Cleaning

• Sub-steps:
  1. If misfire persists, remove the fuel injector connector for cylinder 2.
  2. Test the injector resistance with a multimeter (typically around 12-16 ohms).
  3. If the injector is faulty, replace it.
  4. If it is functioning, use a fuel injector cleaning kit to clean the injector while still installed.

5. Perform Compression Test

• Sub-steps:
  1. Remove the spark plug for cylinder 2.
  2. Insert the compression tester into the spark plug hole.
  3. Crank the engine several times to record the compression reading (should be around 140-200 psi; consult specifications).
  4. If compression is low, further investigation into engine internals may be necessary.