how to fix P0174 code in Honda Accord 10th Generation (2018-2022)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the battery to ensure safety while working on electrical components.

2. Inspect and Repair Vacuum Leaks

• Sub-steps:
  • Visually inspect all vacuum hoses connected to the intake manifold for cracks or disconnections.
  • Use a smoke machine or carburetor cleaner to identify any leaks; listen for hissing sounds.
  • Replace any damaged hoses or gaskets found during inspection.

3. Check Fuel System

• Sub-steps:
  • Connect a fuel pressure gauge to the fuel rail.
  • Start the engine and observe the fuel pressure reading; it should match the manufacturer specifications (typically around 40-50 psi).
  • If pressure is low, check the fuel pump for proper operation and replace if necessary.

4. Clean or Replace MAF Sensor

• Sub-steps:
  • Locate the MAF sensor in the air intake system.
  • Disconnect the electrical connector and remove the sensor from the intake.
  • Use MAF cleaner to clean the sensor element, being careful not to touch it with your fingers.
  • Reinstall the sensor and reconnect the electrical connector.

5. Verify Fuel Injector Operation

• Sub-steps:
  • Remove the fuel injectors from the fuel rail.
  • Inspect for any signs of clogging or damage.
  • Use a fuel injector cleaning kit to clean the injectors or replace them if necessary.

6. Check Exhaust System

• Sub-steps:
  • Inspect the exhaust system for visible cracks or holes that could lead to exhaust leaks.
  • If any leaks are found, repair or replace the affected components.