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

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to prevent electrical issues.
• Ensure the engine is cool before starting work.

2. Inspect and Repair Vacuum Leaks

• Sub-steps:
  • Visually inspect all vacuum hoses connected to the intake manifold and replace any that are cracked or damaged.
  • Use a smoke machine or carburetor cleaner around the intake manifold and hoses to identify vacuum leaks.
• Tools Required: Smoke machine or carburetor cleaner, pliers, replacement hoses as needed.

3. Clean or Replace MAF Sensor

• Sub-steps:
  • Disconnect the MAF sensor connector.
  • Remove the MAF sensor from the air intake duct.
  • Clean the MAF sensor using MAF cleaner spray, avoiding contact with the sensor elements.
  • Reinstall the MAF sensor and reconnect the connector.
• Tools Required: MAF cleaner spray, screwdriver.
• Safety Warnings: Avoid touching the sensor elements as they are delicate.

4. Check Fuel Pressure

• Sub-steps:
  • Locate the fuel pressure test port on the fuel rail.
  • Connect the fuel pressure gauge to the test port.
  • Turn the ignition to the "ON" position (do not start the engine) and check the pressure reading against the manufacturer’s specifications.
  • If pressure is low, inspect the fuel pump and filter.
• Tools Required: Fuel pressure gauge.
• Safety Warnings: Be cautious of fuel spills; have a fire extinguisher nearby.

5. Inspect and Clean Throttle Body

• Sub-steps:
  • Remove the air intake duct connected to the throttle body.
  • Use throttle body cleaner to clean the inside of the throttle body, removing any carbon buildup.
  • Reassemble the air intake duct securely.
• Tools Required: Throttle body cleaner, rags, screwdriver.