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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to prevent electrical shorts.
• Allow the engine to cool down before starting work.

2. Inspect and Repair Air Intake System

• Sub-steps:
  1. Visually inspect the intake hoses and connections for cracks or loose fittings.
  2. Replace any damaged hoses or re-tighten loose clamps.
  3. If necessary, use a smoke machine to identify vacuum leaks.

3. Clean or Replace MAF Sensor

• Sub-steps:
  1. Locate the MAF sensor in the air intake duct.
  2. Disconnect the electrical connector and remove the sensor.
  3. Clean the MAF sensor using MAF cleaner spray; do not touch the sensor element.
  4. If cleaning does not resolve the issue, replace the MAF sensor with a new one.

4. Check Fuel System

• Sub-steps:
  1. Inspect the fuel filter for clogs; replace if necessary.
  2. Test the fuel pump operation and replace it if fuel pressure is low.
  3. Ensure fuel injectors are clean and functioning; consider using a fuel injector cleaning kit if needed.

5. Reassemble and Test

• Sub-steps:
  1. Reconnect all electrical connectors and hoses.
  2. Reconnect the battery.
  3. Start the engine and allow it to reach operating temperature.