how to fix P0174 code on Honda Civic 10th Generation (2016-2021)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to prevent any electrical issues.
• Ensure the engine is cool before starting work.

2. Inspect and Repair Vacuum Leaks

• Sub-steps:
  1. Visually inspect all vacuum hoses and connections for cracks or disconnections.
  2. Use a smoke machine or carburetor cleaner to identify leaks around the intake manifold and vacuum hoses.
  3. Replace any damaged hoses or gaskets found during the inspection.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner or electronic cleaner
• Sub-steps:
  1. Locate the MAF sensor in the air intake duct.
  2. Remove the electrical connector from the MAF sensor.
  3. Unscrew the MAF sensor from its housing and remove it.
  4. Clean the sensor element with MAF cleaner; do not touch the sensor with fingers.
  5. Reinstall the MAF sensor and reconnect the electrical connector.

4. Check and Adjust Fuel Pressure

• Tools Required: Fuel pressure gauge
• Sub-steps:
  1. Locate the fuel rail and the service port on it.
  2. Connect the fuel pressure gauge to the service port.
  3. Turn the ignition key to the "On" position without starting the engine and check the fuel pressure reading.
  4. If the pressure is below specifications, inspect the fuel pump and filter for issues.

5. Inspect Fuel Injectors

• Tools Required: Fuel injector cleaning kit (if needed)
• Sub-steps:
  1. Remove the fuel rail with the injectors attached.
  2. Inspect each injector for clogs or leaks.
  3. Clean the injectors using a fuel injector cleaning kit or replace them if faulty.
  4. Reinstall the fuel rail and ensure proper sealing of gaskets.