how to fix P0174 code in Toyota Camry Eighth Generation (2018-present)

Solution

1. Preparation

• Gather tools and parts needed for repair.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Ensure the engine is cool before starting repairs.

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, hose clamps
• Check all vacuum lines and connections for cracks or disconnections.
• Use a smoke machine or carburetor cleaner to identify leaks if necessary.
• Repair or replace any damaged hoses or connections.

3. Test and Replace MAF Sensor (if necessary)

• Tools Required: Multimeter, MAF cleaner
• Disconnect the MAF sensor connector.
• Measure voltage output from the MAF sensor while the engine is running, following the manufacturer specifications.
• If readings are outside the specified range, clean the MAF sensor with MAF cleaner. If cleaning does not help, replace it with a new part.

4. Inspect and Replace Fuel Injectors (if necessary)

• Tools Required: Injector puller, fuel line disconnect tool
• Relieve pressure from the fuel system by removing the fuel pump fuse and starting the engine until it stalls.
• Disconnect the fuel lines and electrical connectors from the injectors.
• Remove the fuel rail and injectors from the engine.
• Inspect the injectors for clogs, and if needed, clean or replace them.

5. Check Fuel Pressure and Repair Fuel System (if necessary)

• Tools Required: Fuel pressure gauge
• Connect the fuel pressure gauge to the fuel rail’s service port.
• Turn the ignition to the "ON" position without starting the engine and check the pressure.
• Compare the reading to the manufacturer specifications; if low, inspect the fuel pump, fuel filter, and fuel lines for issues.