how to fix P0174 code in Toyota RAV4 XA40 (2013-2018)

Solution

1. Preparation

• Gather tools and safety equipment.
• Disconnect the negative terminal of the battery.
• Ensure the vehicle is on a level surface and secure it with wheel chocks.

2. Inspect and Repair Air Intake System

• Tools Required: Screwdrivers, socket set, vacuum gauge.
• Visually inspect the air intake ducting for cracks or loose connections.
• Tighten any loose clamps and replace any damaged hoses or gaskets.
• Perform a smoke test to find any hidden vacuum leaks.

3. Clean or Replace MAF Sensor

• Tools Required: MAF cleaner, Torx or socket set.
• Remove the MAF sensor from the air intake.
• Spray MAF cleaner onto the sensor elements (do not touch them).
• Allow it to dry, then reattach the sensor.

4. Check Fuel System

• Tools Required: Fuel pressure gauge.
• Connect the fuel pressure gauge to the fuel rail.
• Start the engine and check the pressure; it should be within the manufacturer's specified range (typically around 50-60 psi).
• If low, inspect the fuel pump and fuel filter for issues; replace if necessary.

5. Inspect Fuel Injectors

• Tools Required: Multimeter, injector cleaner, socket set.
• Disconnect the fuel injector connectors.
• Use a multimeter to check the resistance of each injector (should be within specified range).
• If injectors are clogged, use an injector cleaning kit to clean them or replace them if necessary.