why does my Toyota RAV4 Fifth Generation (2019-present) check engine light flash while driving

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shock.
• Allow the engine to cool before starting work.

2. Scan and Identify Codes

• Use an OBD-II scanner to retrieve error codes.
• Note any codes related to misfires, fuel system, or ignition issues.

3. Inspect Ignition Components

• Tools Required: Socket set, torque wrench.
• Remove the engine cover if applicable.
• Check spark plug condition; replace if fouled or worn.
• Test ignition coils for proper resistance using a multimeter; replace if out of specifications.

4. Check Fuel System

• Tools Required: Fuel pressure gauge.
• Locate the fuel rail and connect the fuel pressure gauge.
• Start the engine and monitor the fuel pressure; ensure it meets manufacturer specifications. Replace the fuel pump if pressure is low.

5. Inspect Air Intake and Vacuum System

• Remove the air intake hose and check for blockages or damage.
• Inspect the throttle body for carbon buildup; clean if necessary.
• Use a smoke machine or carburetor cleaner to check for vacuum leaks around the intake manifold and hoses; repair any leaks found.

6. Test Exhaust System

• Inspect the exhaust system for any restrictions or damage, particularly looking at the catalytic converter.
• If the catalytic converter is blocked, replace it to restore proper exhaust flow.