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

Solution

1. Preparation

• Gather tools and parts needed.
• Disconnect the battery negative terminal to ensure safety.
• Allow the engine to cool before beginning work.

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, hose clamps, and a flashlight.
• Check all vacuum hoses and intake manifold gaskets for signs of wear or damage.
• Replace any damaged hoses and tighten any loose connections.

3. Clean or Replace MAF Sensor

• Tools Required: MAF cleaner (specific cleaner for MAF sensors), torx screwdriver.
• Remove the MAF sensor from the air intake duct.
• Spray the MAF sensor with the MAF cleaner and allow it to dry completely before reinstalling.
• If the sensor is damaged, replace it with a new one.

4. Check Fuel Delivery System

• Tools Required: Fuel pressure gauge and multimeter.
• Connect the fuel pressure gauge to the fuel rail and turn on the ignition (do not start the engine) to check fuel pressure.
• Compare the reading to the manufacturer specifications. If low, inspect the fuel pump and filter.
• Test the fuel injectors for proper operation using a multimeter and replace any faulty injectors.

5. Inspect Exhaust System

• Tools Required: Visual inspection tools, possibly a smoke machine.
• Visually inspect the exhaust manifold and pipe for leaks, paying particular attention to bank 2.
• If any leaks are detected, repair or replace the affected components.