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

Solution

1. Preparation

• Gather tools and parts required.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shock.

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, hose clamps, and a spray bottle with soapy water.
• Use the vacuum gauge to check for leaks in the intake manifold and associated hoses.
• Spray soapy water around suspected areas; bubbles will form if leaks are present.
• Replace any damaged hoses or gaskets identified during inspection.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner.
• Disconnect the MAF sensor electrical connector.
• Remove the MAF sensor from the air intake housing.
• Spray MAF sensor cleaner on the sensor elements; do not touch them.
• Allow the sensor to dry completely before reinstalling.

4. Check and Adjust 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 pressure.
• If the pressure is below specifications, check the fuel pump and filter; replace if necessary.

5. Inspect and Clean Fuel Injectors

• Tools Required: Fuel injector cleaner or ultrasonic cleaner.
• Remove the fuel injectors from the engine.
• Clean the injectors using a fuel injector cleaner or send them for ultrasonic cleaning.
• Reinstall the injectors securely and ensure all O-rings are in good condition.

6. Replace ECT Sensor (if necessary)

• Tools Required: Socket set, coolant catch pan.
• Locate the ECT sensor on the engine.
• Disconnect the electrical connector and remove the sensor using a socket.
• Install the new sensor and reconnect the electrical connection.
• Refill any lost coolant.