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

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to ensure safety during repair.

2. Inspect and Repair the Air Intake System

• Tools Required: Screwdriver set, vacuum gauge
• Check all vacuum hoses for cracks or disconnections. Replace any damaged hoses.
• Inspect the intake manifold gasket for leaks and replace if necessary.
• Use a vacuum gauge to test for leaks in the intake system.

3. Clean or Replace the MAF Sensor

• Tools Required: MAF sensor cleaner, Torx screwdriver
• Locate the MAF sensor in the air intake duct.
• Remove the MAF sensor using the Torx screwdriver.
• Spray the sensor with MAF cleaner and allow it to dry completely.
• Reinstall the MAF sensor, ensuring it is secured properly.

4. Check and Repair the Fuel System

• Tools Required: Fuel pressure gauge
• Connect the fuel pressure gauge to the fuel rail and turn the ignition on (do not start the engine).
• Check the fuel pressure against the manufacturer's specifications; replace the fuel pump or fuel filter if the pressure is low.
• Inspect fuel lines for leaks and replace any damaged sections.

5. Inspect and Replace Oxygen Sensors if Necessary

• Tools Required: O2 sensor socket
• Locate the upstream oxygen sensor in the exhaust manifold.
• Disconnect the sensor's electrical connector and use the O2 sensor socket to remove it.
• Install the new oxygen sensor, ensuring the threads are clean and use anti-seize compound as necessary.
• Reconnect the electrical connector.