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Home/Cars/Honda/CR-V/6th Gen (2023-Present)/how to fix P0171 code in Honda CR-V Fifth Generation (2017-2022)

how to fix P0171 code in Honda CR-V Fifth Generation (2017-2022)

Honda CR-V 6th Gen (2023-Present)

Severity: highDifficulty: mediumError Code: P01712-4 hours
4 min read
629 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 P0171 engine lean condition in Honda CR-V 2017-2022. Step-by-step guide with diagnostic procedures and repair instructions.

Error Code
P0171
Component
Engine
Repair Time
2-4 hours

Safety Warnings

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

Symptoms

  • •Check engine light illuminated
  • •Rough idle
  • •Loss of power during acceleration
  • •Decreased fuel efficiency
  • •Engine stalling or hesitation
  • •Increased emissions

Diagnostic Steps

  1. 1Scan for error codes using an OBD-II scanner to confirm P0171 and check for any additional codes.
  2. 2Inspect the air intake system for vacuum leaks, including hoses and gaskets.
  3. 3Check the fuel pressure using a fuel pressure gauge to ensure it meets specifications.
  4. 4Inspect the Mass Air Flow (MAF) sensor for dirt or damage; clean if necessary.
  5. 5Verify the operation of the fuel injectors by checking for proper voltage and resistance.
  6. 6Examine the engine coolant temperature sensor to ensure it is functioning correctly.

Solution

Solution

1. Preparation

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

2. Inspect and Repair Air Intake System

  • Tools Required: Vacuum gauge, hose clamps, screwdriver set
  • Check all vacuum hoses connected to the intake manifold for cracks or disconnections.
  • Replace any damaged hoses or loose connections to eliminate vacuum leaks.
  • Inspect the intake manifold gasket for signs of wear or damage; replace if necessary.

3. Clean or Replace MAF Sensor

  • Tools Required: MAF cleaner, small screwdriver
  • Remove the MAF sensor from the air intake duct using a screwdriver.
  • Clean the sensor with MAF cleaner; do not touch the sensor element.
  • Reinstall the MAF sensor and secure it properly.

4. Check and Adjust Fuel Pressure

  • Tools Required: Fuel pressure gauge, wrenches
  • Connect the fuel pressure gauge to the fuel rail service port.
  • Turn the ignition to the "ON" position (do not start the engine) and check the pressure reading.
  • If pressure is below specifications, consider replacing the fuel filter or fuel pump.

5. Inspect and Test Fuel Injectors

  • Tools Required: Multimeter, injector cleaning kit (if necessary)
  • Use a multimeter to check the resistance of each fuel injector; compare with specifications.
  • If injectors are not within specification, clean or replace them as needed.

6. Replace Engine Coolant Temperature Sensor (if faulty)

  • Tools Required: Socket set, replacement sensor
  • Locate the coolant temperature sensor on the engine.
  • Disconnect the electrical connector and remove the sensor.
  • Install the new sensor and reconnect the electrical connector.

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
  • Multimeter
  • MAF cleaner
  • Socket set
  • Screwdriver set

Parts Required

  • Air intake hoses (if damaged)
  • MAF sensor (if faulty)
  • Fuel filter (if necessary)
  • Fuel pump (if necessary)
  • Fuel injectors (if faulty)
  • Engine coolant temperature sensor (if faulty)

Additional Information

Error CodeP0171
Component

Engine

Repair Time

2-4 hours

Difficulty

medium

Severity

high

Tools

7 items

Parts

6 items

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