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Home/Cars/Honda/Pilot/YF4 (2023-Present)/how to fix P0174 code in Honda Pilot YF3 (2016-2022)

how to fix P0174 code in Honda Pilot YF3 (2016-2022)

Honda Pilot YF4 (2023-Present)

Severity: highDifficulty: mediumError Code: P01742-4 hours
3 min read
565 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix P0174 engine lean condition in Honda Pilot YF3 (2016-2022). Step-by-step guide with diagnostic procedures and repair instructions.

Error Code
P0174
Component
Engine
Repair Time
2-4 hours

Safety Warnings

  • ⚠Disconnect the battery before working on electrical systems.
  • ⚠Allow the engine to cool before opening any components.

Symptoms

  • •Check engine light illuminated
  • •Rough idle
  • •Decreased acceleration and power
  • •Poor fuel economy
  • •Engine stalling or hesitation during acceleration

Diagnostic Steps

  1. 1Scan for error codes using an OBD-II scanner to confirm P0174 and check for any related codes.
  2. 2Inspect the air intake system for vacuum leaks, including hoses and the intake manifold gasket.
  3. 3Check the fuel system for proper operation, including fuel pressure and injector function.
  4. 4Examine the mass airflow (MAF) sensor for dirt or damage and test its operation.
  5. 5Inspect the throttle body for carbon buildup that may restrict airflow.
  6. 6Verify the condition of the fuel filter and pump for any restrictions.

Solution

Solution

1. Preparation

  • Gather tools and parts required for the repair.
  • Disconnect the battery to prevent electrical shorts.
  • Allow the engine to cool down before starting work.

2. Inspect and Repair Vacuum Leaks

  • Tools Required: Flashlight, vacuum gauge, hose clamping tools.
  • Inspect all vacuum hoses connected to the intake manifold for cracks or disconnections.
  • Use a vacuum gauge to check for leaks; replace any damaged hoses.
  • If a leak is found at the intake manifold gasket, remove the manifold and replace the gasket.

3. Clean or Replace MAF Sensor

  • Tools Required: MAF sensor cleaner, Torx screwdriver.
  • Disconnect the MAF sensor electrical connector.
  • Remove the sensor from the air intake housing using the Torx screwdriver.
  • Spray the sensor with MAF cleaner and allow it to dry completely before reinstalling it.
  • Reconnect the electrical connector.

4. Check Fuel System

  • Tools Required: Fuel pressure gauge, basic hand tools.
  • Connect the fuel pressure gauge to the fuel rail test port.
  • Turn the ignition to the ON position (without starting the engine) and check the fuel pressure; it should meet manufacturer specifications.
  • If pressure is low, check the fuel pump and filter for issues, replacing them as necessary.

5. Clean Throttle Body

  • Tools Required: Throttle body cleaner, cleaning cloths, screwdriver.
  • Remove the throttle body from the intake manifold.
  • Spray throttle body cleaner inside and clean using a cloth to remove carbon buildup.
  • Reinstall the throttle body with new gaskets if necessary.

Verification

After completing the repair, verify that the issue has been resolved:

  • Test the affected component to ensure it functions correctly
  • Check for any error codes or warning lights
  • Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

  • •Follow the manufacturer's recommended maintenance schedule
  • •Address warning signs early before they develop into major issues
  • •Use quality parts and fluids recommended for your vehicle
  • •Keep detailed records of all repairs and maintenance

Tools & Equipment Required

  • OBD-II scanner
  • Vacuum gauge
  • Fuel pressure gauge
  • Basic hand tools (screwdrivers, pliers, etc.)
  • Throttle body cleaner
  • MAF sensor cleaner

Parts Required

  • Intake manifold gasket (if applicable)
  • Fuel filter (if needed)
  • Throttle body gasket (if applicable)

Additional Information

Error CodeP0174
Component

Engine

Repair Time

2-4 hours

Difficulty

medium

Severity

high

Tools

6 items

Parts

3 items

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