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

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.