why is my Toyota RAV4's check engine light flashing?

Solution

1. Preparation

• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Gather necessary tools and parts.

2. Address Ignition System Issues

1. Remove Engine Cover (if applicable):
   • Use a socket set to remove any bolts securing the engine cover.
2. Replace Spark Plugs:
   • Disconnect the ignition coil connectors.
   • Remove ignition coils using a socket.
   • Extract old spark plugs with a spark plug socket.
   • Install new spark plugs, ensuring they are gapped correctly (consult specifications).
   • Reinstall ignition coils and connectors.
   • Reattach the engine cover.

3. Inspect and Repair Fuel System

1. Check Fuel Injectors:
   • Remove the fuel injector connector.
   • Test each injector with a multimeter to ensure proper resistance.
   • Clean or replace faulty fuel injectors as necessary.
2. Check Fuel Pressure:
   • Connect a fuel pressure gauge to the fuel rail.
   • Start the engine and monitor pressure; replace the fuel pump if pressure is below specification.

4. Examine Air Intake and Exhaust

1. Inspect Air Filter:
   • Remove the air filter housing cover.
   • Check the air filter for clogging; replace if dirty.
2. Check for Vacuum Leaks:
   • Inspect all hoses connected to the intake manifold for cracks or disconnections.
   • Use a smoke machine if available to locate leaks.
3. Inspect Catalytic Converter:
   • If exhaust blockage is suspected, remove the catalytic converter for inspection.
   • Replace if damaged or clogged.