my Toyota Highlander XU70 (2020-Present) has a check engine light and is shaking

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the vehicle's battery to prevent electrical shorts during repairs.
• Ensure the vehicle is on a flat surface and securely raised if needed.

2. Address Ignition Issues

• Spark Plug Replacement:

  1. Remove the engine cover if applicable.
  2. Disconnect ignition coils from spark plugs.
  3. Using a spark plug socket, remove old spark plugs.
  4. Inspect and replace with new spark plugs (OEM recommended).
  5. Reconnect ignition coils and engine cover.

• Ignition Coil Replacement (if necessary):

  1. Remove any components obstructing access to ignition coils.
  2. Disconnect the electrical connector from the faulty ignition coil.
  3. Remove the ignition coil using a socket.
  4. Install the new ignition coil and reconnect the electrical connector.

3. Inspect and Replace Engine Mounts (if applicable)

1. Visually inspect engine mounts for cracks or signs of wear.
2. If damaged, support the engine with a jack and remove the bolts securing the mounts.
3. Replace the old mounts with new ones and secure them to the engine and chassis.

4. Fuel System Inspection

1. Check fuel pressure using a fuel pressure gauge; it should match manufacturer specifications.
2. If low, inspect the fuel pump and fuel filter for blockages or failures.
3. Replace the fuel filter if clogged, and consider replacing the fuel pump if necessary.