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

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool if it has been running.

2. Inspect and Repair Air Intake System

• Sub-step 1: Visually inspect the air filter and replace it if dirty or clogged.
• Sub-step 2: Tighten any loose clamps and connections in the intake system.
• Sub-step 3: If leaks are found, replace gaskets or hoses as needed.

3. Clean or Replace MAF Sensor

• Sub-step 1: Remove the MAF sensor from the air intake duct.
• Sub-step 2: Use MAF cleaner spray to clean the sensor elements. Do not touch them with fingers or cloths.
• Sub-step 3: If cleaning does not resolve the issue, replace the MAF sensor with a new one.

4. Inspect and Repair Vacuum Leaks

• Sub-step 1: Inspect all vacuum hoses for cracks or disconnections.
• Sub-step 2: Replace any damaged or disconnected hoses.
• Sub-step 3: Perform a smoke test to ensure no leaks are present in the intake manifold.

5. Check and Repair Fuel System

• Sub-step 1: Use a fuel pressure gauge to check the fuel pressure against manufacturer specifications.
• Sub-step 2: If the fuel pressure is low, inspect the fuel pump, filter, and regulator.
• Sub-step 3: Replace any faulty components in the fuel delivery system.