how to fix P0174 code on my Toyota RAV4 Fourth Generation (2013-2018)

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the vehicle's battery to prevent any electrical shorts.
• Ensure the engine is cool before starting work.

2. Inspect and Repair Air Intake System

• Sub-steps:
  1. Visually inspect all air intake hoses for cracks or disconnections.
  2. Replace any damaged hoses with OEM parts.
  3. Check the intake manifold gasket for leaks and replace if necessary.

3. Clean or Replace MAF Sensor

• Sub-steps:
  1. Remove the MAF sensor from the air intake duct.
  2. Clean the sensor with MAF cleaner spray, following the manufacturer's instructions.
  3. Reinstall the sensor and ensure all connections are secure.

4. Check and Repair Fuel Delivery System

• Sub-steps:
  1. Attach a fuel pressure gauge to the fuel rail's service port.
  2. Turn the ignition to the "ON" position (do not start the engine) and check the fuel pressure.
  3. If pressure is low, inspect the fuel pump and fuel filter; replace as needed.
  4. If injectors are faulty, remove and replace them with new OEM components.

5. Inspect and Repair Exhaust System

• Sub-steps:
  1. Visually inspect the exhaust system for any signs of leaks or damage.
  2. Repair any exhaust leaks found, ensuring all connections are sealed.