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

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the battery to prevent any electrical short circuits.

2. Inspect and Repair Air Intake System

• Sub-steps:
  1. Visually inspect the air intake hoses and connections for cracks or loose fittings.
  2. If any leaks are found, replace the damaged hoses or tighten the connections.
  3. Check the intake manifold gasket for integrity; replace if it is damaged.

3. Fuel System Inspection

• Sub-steps:
  1. Remove the fuel pressure gauge and connect it to the fuel rail.
  2. Turn the ignition to the "ON" position (without starting the engine) to check fuel pressure.
  3. If fuel pressure is below specifications (typically around 40-50 psi), inspect the fuel pump and filter for blockages or wear.
  4. If necessary, replace the fuel filter and/or fuel pump.

4. MAF Sensor Cleaning or Replacement

• Sub-steps:
  1. Locate the MAF sensor on the air intake duct.
  2. Disconnect the electrical connector and unscrew the sensor from its housing.
  3. Use MAF cleaner to spray the sensor elements gently; allow it to dry completely before reinstalling.
  4. If the sensor is heavily damaged, replace it with a new one.

5. Fuel Injector Cleaning or Replacement

• Sub-steps:
  1. Remove the engine cover, if applicable.
  2. Disconnect the fuel injector electrical connectors and fuel lines (ensure to relieve fuel pressure first).
  3. Remove the fuel injectors from the fuel rail.
  4. Use a specialized injector cleaning kit to clean the injectors; alternatively, replace them if they are clogged or defective.