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

Solution

1. Preparation

• Gather tools and materials: OBD-II scanner, fuel pressure gauge, multimeter, MAF cleaner, basic socket set, and replacement parts as needed.
• Ensure the vehicle is parked on a level surface, and the engine is cool.

2. Inspect and Repair Air Intake System

• Sub-steps:
  • Visually inspect all air intake hoses and connections for cracks or disconnections.
  • Tighten any loose clamps or replace damaged hoses.
  • If the intake manifold gasket is suspected to be leaking, proceed to the next step.

3. Replace Intake Manifold Gasket (if necessary)

• Sub-steps:
  • Disconnect the negative battery terminal.
  • Remove the intake manifold by first detaching any connected sensors and hoses.
  • Unbolt the intake manifold using a socket wrench (torque specifications: generally 16-20 ft-lbs but refer to service manual).
  • Remove the old gasket and clean the mating surfaces.
  • Install the new gasket and reattach the intake manifold.

4. Clean or Replace MAF Sensor

• Sub-steps:
  • Disconnect the MAF sensor connector.
  • Remove the MAF sensor from the air intake duct.
  • Clean the sensor using MAF cleaner. Allow it to dry completely before reinstallation.
  • If damaged, replace the MAF sensor with a new one.

5. Test and Replace Fuel Injectors (if necessary)

• Sub-steps:
  • Disconnect the fuel injector connectors.
  • Use a multimeter to check for proper resistance (specifications can be found in the repair manual).
  • If faulty, replace injectors with new units.