my Toyota RAV4 Fourth Generation (2013-2018) has a check engine light and high mileage, what to do

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety while working on electrical components.
• Ensure the vehicle is parked on a level surface.

2. Retrieve and Address Error Codes

• Use the OBD-II scanner to retrieve the trouble codes.
• Research the codes to understand the underlying issues (e.g., P0420 for catalytic converter efficiency).

3. Inspect and Replace Components

• Air Filter:

  1. Remove the air filter cover.
  2. Take out the old air filter and install a new one.
  3. Reattach the cover securely.

• Spark Plugs:

  1. Remove the ignition coil(s) by unscrewing them.
  2. Take out the old spark plugs using a spark plug socket.
  3. Install new spark plugs with a torque value of 13 lb-ft.
  4. Reinstall the ignition coil(s).

4. Fuel System Check

• If fuel pressure is low:
  1. Disconnect the fuel pump relay.
  2. Check the fuel pressure using a fuel pressure gauge.
  3. If low, replace the fuel pump, ensuring to relieve system pressure first.

5. Gas Cap Check

• If the gas cap is damaged:
  1. Replace with a new gas cap that matches OEM specifications.