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

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery to prevent electrical shorts.

2. Inspect and Repair Vacuum Leaks

• Sub-steps:
  • Visually inspect all vacuum lines and hoses connected to the intake manifold for cracks or disconnections.
  • Use a smoke machine or carburetor cleaner to find any hidden leaks.
  • Replace any damaged hoses with OEM parts.

3. Clean or Replace MAF Sensor

• Tools required: MAF sensor cleaner, screwdriver.
• Sub-steps:
  • Locate the MAF sensor in the air intake duct.
  • Disconnect the electrical connector and remove the sensor using a screwdriver.
  • Clean the sensor with MAF sensor cleaner and let it dry completely.
  • Reinstall the sensor and reconnect the electrical connector.

4. Check Fuel System

• Sub-steps:
  • Using a fuel pressure gauge, check the fuel pressure to ensure it meets specifications (usually around 40-50 psi).
  • If pressure is low, check the fuel pump and fuel filter for issues.
  • Inspect fuel injectors for clogs; clean or replace if necessary.

5. Inspect Exhaust System

• Sub-steps:
  • Inspect the exhaust system for any leaks, especially near the front oxygen sensor.
  • Repair or replace any damaged exhaust components.

6. Reconnect Battery and Clear Codes

• Reconnect the battery and use the OBD-II scanner to clear the P0174 code.
• Start the engine and check for any new codes.