how to fix P0171 code on Honda CR-V Sixth Generation (2023-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.

2. Inspect and Repair Air Intake System

• Sub-steps:
  1. Visually inspect the air intake duct and hoses for cracks or loose fittings.
  2. Replace any damaged hoses or fittings.
  3. Use a smoke machine to detect hidden vacuum leaks if necessary.

3. Check and Clean MAF Sensor

• Sub-steps:
  1. Disconnect the MAF sensor electrical connector.
  2. Remove the MAF sensor from the air intake housing using a Torx or Phillips screwdriver.
  3. Use MAF sensor cleaner to gently clean the sensor element, avoiding contact with any other parts.
  4. Allow it to dry completely before reinstalling.

4. Fuel Pressure Test

• Sub-steps:
  1. Locate the fuel pressure test port on the fuel rail.
  2. Attach the fuel pressure gauge and turn the ignition to the "ON" position (do not start the engine).
  3. Record the fuel pressure reading; refer to the service manual for specifications.
  4. If the pressure is low, consider replacing the fuel pump or fuel filter.

5. Inspect Fuel Injectors

• Sub-steps:
  1. Remove the fuel rail assembly to access the fuel injectors.
  2. Inspect each injector for signs of clogging or wear.
  3. Clean or replace any faulty injectors as needed.

6. Reconnect and Test

• Sub-steps:
  1. Reconnect the negative battery terminal.
  2. Clear the P0171 code using the OBD-II scanner.
  3. Start the engine and monitor for any returning codes.

Tools Required:

• OBD-II scanner
• Fuel pressure gauge
• Socket set
• Torque wrench
• MAF sensor cleaner
• Smoke machine (optional)

Parts Required:

• Vacuum hoses (if damaged)
• MAF sensor (if faulty)
• Fuel injectors (if clogged or defective)
• Fuel filter (if necessary)

Estimated Repair Time: 2-4 hours

Safety Warnings:

• Disconnect the battery before working on electrical components.
• Allow the engine to cool before performing repairs.