how to fix P0174 code on Toyota Tacoma N300 (2016-Present)

Solution

1. Preparation

• Gather tools and parts required for repairs.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Repair Air Intake System

• Sub-steps:
  • Check all air intake hoses and connections for cracks or loose fittings.
  • Replace any damaged hoses with OEM or equivalent parts.
  • Inspect the intake manifold gasket; replace if damaged.

3. Clean or Replace MAF Sensor

• Sub-steps:
  • Remove the MAF sensor from the air intake duct using a Torx or screwdriver.
  • Clean the MAF sensor with MAF cleaner spray and allow it to dry.
  • Reinstall the MAF sensor securely.

4. Check and Adjust Fuel Pressure

• Sub-steps:
  • Connect a fuel pressure gauge to the fuel rail.
  • Turn the ignition to the "ON" position (do not start the engine) and check the fuel pressure reading.
  • If the pressure is below specifications, inspect the fuel pump and replace it if necessary.

5. Inspect and Clean Fuel Injectors

• Sub-steps:
  • Remove the fuel rail and injectors from the intake manifold.
  • Clean the injectors using a specialized injector cleaning kit or replace them if they are clogged.
  • Reinstall the injectors and fuel rail, ensuring all connections are secure.