what causes my Toyota Tacoma N300 (2016-Present) check engine light to flash

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative terminal of the battery.

2. Address Ignition System

• Inspect Spark Plugs and Wires:

  • Remove the ignition wires from the spark plugs carefully.
  • Unbolt and extract the spark plugs using a socket wrench.
  • Inspect for wear, carbon buildup, or damage; replace if necessary.

• Replace Ignition Coils:

  • Remove screws securing the ignition coils.
  • Disconnect the electrical connectors from each ignition coil.
  • Remove and replace with new coils, ensuring they are properly seated.

3. Inspect Fuel System

• Check Fuel Pressure:

  • Connect a fuel pressure gauge to the fuel rail test port.
  • Turn the ignition key to the "on" position (do not start) and check the pressure reading.
  • If pressure is low, replace the fuel filter or inspect the fuel pump.

• Clean or Replace Fuel Injectors:

  • Disconnect fuel lines and electrical connectors from the injectors.
  • Remove the injectors from the fuel rail.
  • Clean or replace injectors as necessary, ensuring proper seals are used upon reinstallation.

4. Check for Vacuum Leaks

• Visual Inspection:

  • Inspect all vacuum hoses for cracks, splits, or disconnections.
  • Check the intake manifold gaskets for integrity.

• Use Smoke Test:

  • If vacuum leaks are suspected, perform a smoke test to identify leaks in the intake system.

5. Reconnect Battery and Clear Codes

• Reconnect the negative terminal of the battery.
• Use the OBD-II scanner to clear any trouble codes.

6. Final Check

• Start the engine and allow it to reach operating temperature.
• Monitor the engine's performance and check if the check engine light reappears.