how to fix the 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.

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, hose clamps, socket set.
• Use a vacuum gauge to check for leaks in the intake manifold and vacuum lines.
• Visually inspect and replace any damaged hoses or gaskets.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, screwdriver.
• Remove the MAF sensor from the intake duct.
• Clean the sensor with MAF cleaner according to the manufacturer's instructions. If cleaning does not resolve the issue, replace the MAF sensor.

4. Inspect Fuel System

• Tools Required: Fuel pressure gauge, wrenches.
• Connect a fuel pressure gauge to the fuel rail and check for proper fuel pressure (consult specifications for the Honda Pilot).
• If pressure is low, inspect the fuel filter and fuel pump for issues; replace as necessary.

5. Check Oxygen Sensors

• Tools Required: O2 sensor socket, multimeter.
• Inspect the rear O2 sensor for functionality by checking its voltage output with a multimeter while the engine is running. Replace if faulty.

6. Reassemble and Reconnect

• Reinstall any components removed during inspection and repair.
• Reconnect the negative battery terminal.