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

Solution

1. Preparation

• Gather tools and parts needed for repair.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool down if it has been running.

2. Inspect and Repair Vacuum Leaks

• Sub-steps:
  1. Visually inspect all vacuum hoses for cracks or disconnections.
  2. Use a smoke machine or carburetor cleaner around hoses and gaskets to detect leaks.
  3. Replace any damaged hoses or gaskets.

Tools Required:

• Smoke machine or carburetor cleaner
• Pliers for hose removal

3. Fuel System Check

• Sub-steps:
  1. Connect a fuel pressure gauge to the fuel rail.
  2. Turn the ignition to the "ON" position without starting the engine and observe the pressure reading.
  3. If the pressure is below specifications (usually around 40-50 PSI), check the fuel pump and filter.
  4. Replace the fuel filter if clogged and test the fuel pump operation.

Tools Required:

• Fuel pressure gauge
• Wrench set for fuel line removal

4. Clean or Replace MAF Sensor

• Sub-steps:
  1. Disconnect the electrical connector from the MAF sensor.
  2. Remove the MAF sensor using a Torx or Phillips screwdriver.
  3. Clean the MAF sensor with MAF sensor cleaner or replace it if damaged.
  4. Reinstall the MAF sensor and reconnect the electrical connector.

Tools Required:

• MAF sensor cleaner
• Screwdriver set

5. Inspect and Test Fuel Injectors

• Sub-steps:
  1. Disconnect the fuel injector connectors.
  2. Use a noid light to check for signal to each injector when the engine is cranked.
  3. If no signal is detected, check the ECM and wiring.
  4. Replace any faulty injectors.

Tools Required:

• Noid light
• Multimeter