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

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the battery to ensure safety during repairs.

2. Inspect and Repair Air Intake System

• Tools Required: Socket set, screwdrivers
• Check the air intake duct for cracks or loose connections. Tighten or replace any damaged sections.
• Inspect vacuum hoses for any cracks or leaks; replace as necessary.

3. Test and Replace Fuel System Components

• Tools Required: Fuel pressure gauge
• Connect the fuel pressure gauge to the fuel rail and turn the ignition to the "ON" position (do not start the engine).
• Check the fuel pressure against manufacturer specifications (usually around 30-40 psi). If pressure is low, inspect the fuel pump and fuel filter.
• Replace the fuel filter if it is clogged.

4. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner or isopropyl alcohol
• Disconnect the MAF sensor connector and remove the sensor from the air intake.
• Spray the MAF sensor with the cleaner and let it dry completely before reinstalling. If damaged, replace the sensor.

5. Inspect and Replace Oxygen Sensors

• Tools Required: O2 sensor socket
• Locate the bank 2 oxygen sensor (typically after the catalytic converter).
• Disconnect the sensor connector and remove it using the O2 sensor socket. Install the new sensor and reconnect the connector.