how to fix P0174 code in my Toyota Camry XV70 (2018-2024)

Solution

1. Preparation

• Gather tools and materials: OBD-II scanner, vacuum gauge, fuel pressure gauge, MAF cleaner, socket set, and safety glasses.
• Disconnect the negative battery terminal to avoid electrical shorts.

2. Inspect and Repair Vacuum Leaks

• Use a vacuum gauge to check for leaks in the intake manifold and hoses.
• Replace any damaged hoses or gaskets found during inspection.

3. Fuel System Check

• Connect a fuel pressure gauge to the fuel rail.
• Start the engine and observe the fuel pressure reading; it should be within the manufacturer's specified range (typically between 40-50 psi).
• If pressure is low, inspect the fuel pump and fuel filter for clogs or failures. Replace as necessary.

4. Clean or Replace MAF Sensor

• Locate the MAF sensor in the air intake duct.
• Disconnect the electrical connector and remove the sensor from its housing.
• Clean the sensor with a dedicated MAF cleaner, avoiding contact with the sensor element.
• If damaged, replace the MAF sensor with an OEM part.

5. Inspect and Test Fuel Injectors

• Check the electrical connections to each fuel injector for damage or corrosion.
• Perform a fuel injector flow test to ensure proper operation; replace any faulty injectors.

6. Oxygen Sensor Check

• Use an OBD-II scanner to check the live data from the oxygen sensors.
• If the bank 2 sensor is not responding correctly, replace it according to the manufacturer’s specifications.