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

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to prevent electrical shock.
• Allow the engine to cool down before beginning work.

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, hose clamps, socket set
• Visually inspect all vacuum hoses connected to the intake manifold for cracks or disconnections.
• Use a vacuum gauge to test for leaks in the intake system.
• Replace any damaged hoses or gaskets found during the inspection.

3. Clean or Replace MAF Sensor

• Tools Required: MAF cleaner or isopropyl alcohol, soft cloth
• Locate the MAF sensor in the air intake duct.
• Disconnect the electrical connector and remove the MAF sensor from the intake duct carefully.
• Spray MAF cleaner on the sensor elements and allow to dry completely before reinstallation.
• If the sensor is damaged, replace it with a new one.

4. Check Fuel System

• Tools Required: Fuel pressure gauge, multimeter
• Attach a fuel pressure gauge to the fuel rail and turn the ignition to the ON position without starting the engine.
• Check that the fuel pressure meets the manufacturer specifications (usually around 40-50 PSI for Honda).
• If pressure is low, inspect the fuel pump, fuel filter, and fuel injectors for proper operation and replace any faulty components.

5. Test Oxygen Sensors

• Tools Required: Multimeter
• Locate the upstream and downstream oxygen sensors.
• Using a multimeter, test the sensors for proper voltage output (typically 0.1 to 0.9 volts during operation).
• Replace any oxygen sensors that do not meet specifications.