my Toyota Corolla E210 (2019-2024) check engine light is flashing, what does it mean?

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is off.
• Disconnect the battery to prevent electrical shock.

2. Inspect and Replace Ignition Components

• Tools Required: Socket set, torque wrench, spark plug socket
• Sub-steps:
  1. Remove the engine cover (if applicable) by unscrewing the bolts.
  2. Disconnect the ignition coils by unplugging the electrical connectors.
  3. Remove the ignition coils using the socket set.
  4. Inspect the spark plugs for wear; if damaged, replace with OEM parts.
  5. Install new spark plugs to the manufacturer's specified torque (typically 13-15 ft-lbs).
  6. Reinstall the ignition coils, ensuring they are seated correctly and reconnect the electrical connectors.

3. Fuel System Inspection

• Tools Required: Fuel pressure gauge
• Sub-steps:
  1. Locate the fuel rail and remove the Schrader valve cap.
  2. Connect the fuel pressure gauge to the Schrader valve.
  3. Turn the ignition to the "On" position (do not start the engine) and check the fuel pressure; it should match the specification in the service manual (typically around 50-60 psi).
  4. If pressure is low, check the fuel pump and filter for malfunctions; replace as necessary.

4. Vacuum Leak Check

• Tools Required: Smoke machine (optional), propane torch
• Sub-steps:
  1. Visually inspect all vacuum hoses for cracks or disconnections.
  2. Use a smoke machine to introduce smoke into the intake; watch for smoke escaping which indicates a leak.
  3. Repair or replace any damaged hoses or intake gaskets.