how to fix P0174 code in Honda Pilot Third Generation (2016-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool before beginning work.

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, hose clamps
• Instructions:
  1. Visually inspect all vacuum hoses and connectors for cracks or disconnections.
  2. Use a vacuum gauge to check for proper vacuum levels; replace any faulty hoses.
  3. Retest for leaks using a smoke machine if available.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, torque wrench
• Instructions:
  1. Locate the MAF sensor in the air intake duct.
  2. Disconnect the electrical connector and remove the MAF sensor using the appropriate socket.
  3. Clean the sensor using MAF cleaner, ensuring not to touch the sensor elements.
  4. Reinstall the MAF sensor and torque to manufacturer specifications.

4. Check Fuel System

• Tools Required: Fuel pressure gauge, socket set
• Instructions:
  1. Connect the fuel pressure gauge to the fuel rail's service port.
  2. Turn the ignition to the "ON" position without starting the engine to check pressure.
  3. Compare the reading to manufacturer specifications (typically around 30-40 PSI).
  4. If pressure is low, inspect and replace the fuel filter or fuel pump if necessary.

5. Inspect and Test Fuel Injectors

• Tools Required: Multimeter, fuel injector cleaner
• Instructions:
  1. Disconnect the fuel injector connectors.
  2. Use a multimeter to test the resistance of each injector; refer to specifications.
  3. If resistance is out of range, replace the injector.
  4. Optionally, use a fuel injector cleaner to clean the injectors if they are operational.