how to fix P0174 code in Toyota RAV4 Fifth Generation (2019-present)

Solution

1. Preparation

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

2. Inspect and Repair Air Intake System

• Sub-steps:
  • Visually inspect all air intake hoses and connections for cracks or loose fittings.
  • Tighten any loose clamps and replace damaged hoses.
  • If leaks are detected, replace the faulty components.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner
• Sub-steps:
  • Locate and remove the MAF sensor from the air intake duct.
  • Spray the MAF sensor with MAF cleaner and let it dry completely.
  • Reinstall the MAF sensor and ensure it is securely connected.

4. Check Fuel Pressure

• Tools Required: Fuel pressure gauge
• Sub-steps:
  • Attach the fuel pressure gauge to the fuel rail Schrader valve.
  • Turn the ignition key to the "ON" position (do not start the engine) and check the fuel pressure.
  • If the pressure is below the manufacturer specifications, check the fuel pump and fuel filter for issues.

5. Inspect and Clean Fuel Injectors

• Tools Required: Fuel injector cleaner kit (if cleaning is needed)
• Sub-steps:
  • Remove the fuel rail to access the injectors.
  • Inspect each injector for clogs or leaks.
  • Clean the injectors using a fuel injector cleaner kit or replace them if necessary.
  • Reinstall the fuel rail and ensure all connections are secure.

6. Clear Error Codes

• Use the OBD-II scanner to clear the P0174 code from the vehicle's computer.