how to resolve the P0174 code in my Toyota Camry Eighth Generation (2018-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to prevent any electrical shorts.
• Allow the engine to cool down if it has been running.

2. Inspect and Clean MAF Sensor

• Tools Required: MAF sensor cleaner, screwdriver.
• Remove the MAF sensor from the air intake duct.
• Spray the MAF sensor with the cleaner and allow it to dry completely.
• Reinstall the MAF sensor securely.

3. Check for Vacuum Leaks

• Tools Required: Vacuum gauge, smoke machine (if available).
• Visually inspect all vacuum hoses for cracks or disconnections.
• Use the vacuum gauge to check the intake manifold pressure.
• If using a smoke machine, introduce smoke to the intake and check for leaks.

4. Test Fuel Pressure

• Tools Required: Fuel pressure gauge.
• Locate the fuel rail and connect the fuel pressure gauge.
• Turn the ignition to the "on" position without starting the engine and check the fuel pressure reading. It should meet manufacturer's specifications (typically around 40-50 psi).
• If the pressure is low, inspect the fuel pump and filter for issues.

5. Inspect Oxygen Sensors

• Tools Required: O2 sensor socket, multimeter.
• Locate the bank 2 oxygen sensor and disconnect the electrical connector.
• Use the O2 sensor socket to remove the sensor.
• Inspect the sensor for contamination and test with a multimeter to ensure proper operation.

6. Fuel Injector Inspection

• Tools Required: Fuel injector cleaning kit, multimeter.
• Disconnect the fuel injector connectors and remove the injectors from the fuel rail.
• Clean the injectors with a cleaning kit and test them for resistance using a multimeter.