how to fix P0174 code in Toyota Camry Seventh Generation (2012-2017)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the battery to prevent electrical shorts during the repair.

2. Inspect and Repair Air Intake System

• Tools Required: Socket set, screwdrivers, vacuum gauge
• Inspect all air intake hoses for cracks or disconnections.
• If any hoses are damaged, replace them with OEM parts.
• Reconnect all hoses securely.
• Check the intake manifold gasket for leaks; replace if necessary.

3. Clean or Replace MAF Sensor

• Tools Required: MAF cleaner, small screwdriver
• Disconnect the MAF sensor connector.
• Remove the sensor from the air intake.
• Clean the sensor with MAF cleaner and let it dry.
• If the sensor is damaged, replace it with a new one.
• Reinstall the sensor and reconnect the connector.

4. Check and Adjust Fuel Pressure

• Tools Required: Fuel pressure gauge
• Locate the fuel pressure test port on the fuel rail.
• Attach the fuel pressure gauge to the test port.
• Turn the ignition to the "ON" position (without starting) and check the pressure reading.
• If pressure is below specifications, check the fuel pump and filter; replace if necessary.

5. Inspect and Test Fuel Injectors

• Tools Required: Noid light
• Disconnect the injector connectors.
• Connect a noid light to each injector connector and crank the engine.
• The noid light should flash if the injector is functioning properly.
• If the light does not flash, replace the faulty injector.