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

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Spark Plug

• Remove the ignition coil for cylinder 2:
  • Unscrew any retaining bolts and disconnect the electrical connector.
• Remove the spark plug:
  • Use a spark plug socket and ratchet to unscrew the spark plug.
• Inspect the spark plug:
  • Check for signs of wear, fouling, or incorrect gap.
• Replace with a new spark plug if necessary:
  • Ensure the new spark plug is gapped according to manufacturer specifications (0.043 inches for most RAV4 models).
  • Install the new spark plug and torque to manufacturer specifications (approximately 13 lb-ft).

3. Test and Replace Ignition Coil

• Reinstall the ignition coil for cylinder 2:
  • Ensure it is securely connected and the electrical connector is attached.
• If the issue persists, test the ignition coil:
  • Use a multimeter to measure resistance. Consult the service manual for specific resistance values.
• Replace the ignition coil if it is found to be faulty.

4. Inspect and Replace Fuel Injector

• Remove the intake manifold or necessary components to access the fuel injector for cylinder 2.
• Test the injector for proper operation:
  • Use a noid light or multimeter to check for pulse and resistance.
• Replace the fuel injector if it is not functioning correctly.

5. Check for Vacuum Leaks

• Inspect vacuum lines and gaskets around cylinder 2 for leaks.
• Use a smoke machine or carburetor cleaner to detect leaks.
• Replace any damaged vacuum lines or gaskets found.

6. Compression Test

• Conduct a compression test on cylinder 2:
  • Remove the spark plug and use a compression gauge.
  • Compare the results to manufacturer specifications (usually around 180-200 psi).
• If compression is low, further diagnostic procedures may be necessary to assess for internal engine issues.