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

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Repair Air Intake System

• Tools Required: Socket set, screwdrivers.
• Inspect the air intake hoses and connections for cracks or loose fittings.
• Tighten or replace any loose or damaged hoses.
• Check the intake manifold gasket for leaks; replace if faulty.

3. Test and Clean MAF Sensor

• Tools Required: MAF sensor cleaner.
• Disconnect the MAF sensor connector.
• Remove the sensor from the air intake system.
• Spray MAF sensor cleaner onto the sensing element and allow it to dry completely before reinstallation.

4. Fuel Pressure Check

• Tools Required: Fuel pressure gauge.
• Connect the fuel pressure gauge to the fuel rail test port.
• Turn the ignition to the ON position (do not start the engine) and check the fuel pressure reading against manufacturer specifications.
• If the pressure is low, check the fuel pump and filter; replace as necessary.

5. Inspect and Clean Fuel Injectors

• Tools Required: Fuel injector cleaning kit (if applicable).
• Remove the fuel injectors from the fuel rail.
• Inspect for clogs or leaks; clean or replace injectors as needed.
• Reinstall injectors ensuring they are seated properly.

6. Check for Exhaust Leaks

• Tools Required: Exhaust leak detection tool or smoke machine.
• Visually inspect the exhaust system for cracks or loose connections.
• Use a smoke machine if necessary to locate any hidden leaks.
• Repair or replace exhaust components as needed.