my Toyota Corolla E170 (2013-2019) check engine light is flashing what does it mean

Solution

1. Preparation

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

2. Scan for Error Codes

• Connect the OBD-II scanner to the vehicle's diagnostic port.
• Turn the ignition to the "ON" position without starting the engine.
• Record all diagnostic trouble codes (DTCs) displayed.

3. Inspect and Replace Ignition Components

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the engine cover if necessary.
• Disconnect the ignition coils and remove them.
• Check spark plugs for wear; replace if they are worn or fouled.
• Reinstall new ignition coils and ensure they are torqued to manufacturer specifications.

4. Check Fuel Injectors

• Tools Required: Fuel pressure gauge, multimeter.
• Connect the fuel pressure gauge to the fuel rail.
• Turn the ignition to the "ON" position and check fuel pressure; it should meet specifications.
• If pressure is low, check the fuel pump and filter.
• Use the multimeter to test the resistance of the fuel injectors; replace any that are out of specification.

5. Inspect Air Intake System

• Check the air filter for dirt and replace if necessary.
• Inspect the intake duct for cracks or loose connections.
• Clean the throttle body with appropriate cleaner if it shows carbon build-up.

6. Examine Exhaust System

• Inspect the exhaust for leaks or blockages.
• If equipped, test the catalytic converter for proper function using a temperature difference test.