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

Solution

1. Preparation

• Gather tools and parts.
• Park the vehicle on a level surface and engage the parking brake.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, hose clamps, flashlight
• Inspect all vacuum hoses for cracks or disconnections. Replace any damaged hoses.
• Use a vacuum gauge to check for leaks at the intake manifold. Tighten or replace gaskets as needed.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, Torx screwdriver
• Remove the MAF sensor from the intake duct.
• Spray the MAF sensor with MAF cleaner to remove any debris. Allow it to dry completely.
• Reinstall the MAF sensor, ensuring it is securely fastened.

4. Check and Adjust Fuel Pressure

• Tools Required: Fuel pressure gauge
• Connect the fuel pressure gauge to the fuel rail.
• Turn the ignition to the "ON" position (do not start the engine) and check the fuel pressure against manufacturer specifications.
• If the pressure is low, inspect the fuel pump, fuel filter, and fuel lines for blockages or failures.

5. Inspect and Test Fuel Injectors

• Tools Required: Multimeter, injector cleaner
• Disconnect the electrical connectors from the fuel injectors.
• Use a multimeter to check the resistance of each injector. Replace any injectors that are out of spec.
• If injectors are clogged, use an injector cleaning solution to clean them or replace if necessary.

6. Replace ECT Sensor (if needed)

• Tools Required: Socket set, torque wrench
• Locate the ECT sensor on the engine block.
• Disconnect the electrical connector and unscrew the sensor.
• Install the new ECT sensor, tightening it to the manufacturer's torque specification.
• Reconnect the electrical connector.