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

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Repair Air Intake System

• Sub-steps:
  1. Remove the air intake duct and inspect for cracks or loose connections.
  2. Replace any damaged hoses or clamps.
  3. Reinstall the duct securely.

3. Check and Clean MAF Sensor

• Sub-steps:
  1. Locate the MAF sensor in the air intake system.
  2. Disconnect the electrical connector from the MAF sensor.
  3. Use MAF cleaner spray to clean the sensor element; avoid touching it with fingers.
  4. Reconnect the electrical connector once dry.

4. Inspect Fuel System

• Sub-steps:
  1. Connect a fuel pressure gauge to the fuel rail.
  2. Turn the ignition to the "ON" position (do not start the engine) and check the fuel pressure reading against manufacturer specifications (typically around 50-60 psi).
  3. If pressure is low, replace the fuel filter and/or inspect the fuel pump.
  4. Reconnect all components after inspection.

5. Inspect and Repair Vacuum Lines

• Sub-steps:
  1. Visually inspect all vacuum lines for signs of wear or damage.
  2. Replace any cracked or damaged vacuum hoses.
  3. Ensure all connections are snug and secure.