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

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Ensure the vehicle is on a flat surface and safely supported with jack stands if needed.

2. Inspect and Repair Air Intake System

• Tools Required: Socket set, screwdrivers, vacuum gauge
• Inspect the air intake assembly for cracks or loose connections.
• Tighten any loose clamps and replace damaged hoses.
• If any vacuum leaks are found, replace the faulty components.

3. Check and Clean MAF Sensor

• Tools Required: MAF cleaner
• Remove the MAF sensor from the air intake duct.
• Spray MAF cleaner on the sensor elements carefully; do not touch them with fingers or tools.
• Allow it to air dry before reinstalling the sensor.

4. Test and Adjust Fuel Pressure

• Tools Required: Fuel pressure gauge
• Connect the fuel pressure gauge to the fuel rail.
• Turn the ignition on (without starting the engine) and observe the pressure; it should match the manufacturer's specifications (typically around 50-60 psi).
• If pressure is low, check the fuel pump and filter; replace if necessary.

5. Replace Oxygen Sensors

• Tools Required: O2 sensor socket, torque wrench
• If the oxygen sensors are faulty, remove them using an O2 sensor socket.
• Install new oxygen sensors and torque them to manufacturer specifications (usually around 30 lb-ft).
• Reconnect the electrical connectors.

6. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0174 code and any other related codes.
• Start the engine and allow it to idle.