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

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, compression tester, fuel injector cleaning kit, multimeter.
• Ensure the vehicle is parked on a flat surface, and the engine is cool. Disconnect the battery before starting work on the ignition system.

2. Inspect and Replace Spark Plug

• Remove the ignition coil from cylinder 2:
  1. Disconnect the electrical connector from the ignition coil.
  2. Remove the bolts securing the ignition coil and pull it out.
• Remove the spark plug:
  1. Use a spark plug socket to loosen and remove the spark plug from cylinder 2.
• Inspect the spark plug for wear or fouling. Replace it if necessary:
  1. Install a new spark plug, ensuring it is gapped correctly according to manufacturer specifications (typically 0.043 inches for this model).
  2. Torque the spark plug to the manufacturer's specifications (typically 13 lb-ft).
• Reinstall the ignition coil, securing it with bolts and reconnecting the electrical connector.

3. Test and Replace Ignition Coil (if needed)

• Use a multimeter to test the ignition coil:
  1. Measure the primary and secondary resistance according to specifications.
• If the ignition coil is faulty:
  1. Remove the old ignition coil.
  2. Install a new ignition coil for cylinder 2.
  3. Reconnect the electrical connector.

4. Inspect and Clean Fuel Injector

• Remove the fuel injector for cylinder 2:
  1. Relieve fuel pressure from the fuel system.
  2. Disconnect the fuel line and electrical connector from the injector.
  3. Remove the injector retaining clips and pull the injector out.
• Clean the fuel injector using a cleaning kit or replace it if clogged or damaged.
• Reinstall the fuel injector and ensure all connections are secure.

5. Perform Compression Test

• Use a compression tester:
  1. Remove the spark plug for cylinder 2.
  2. Insert the compression tester into the spark plug hole.
  3. Crank the engine for a few seconds and record the reading.
• Compare the compression reading to manufacturer specifications (typically around 180 psi). If low, further diagnosis may be needed for internal engine issues.