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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to prevent electrical shorts.

2. Inspect and Repair Vacuum Leaks

• Use a smoke machine or carburetor cleaner to check for leaks in the intake manifold and vacuum hoses.
• If leaks are found, replace affected hoses or gaskets.
• Reconnect the battery.

3. Clean the Mass Air Flow Sensor

• Remove the MAF sensor from the air intake duct.
• Use a dedicated MAF sensor cleaner to clean the sensor elements gently.
• Allow the sensor to dry completely before reinstalling.

4. Check Fuel Pressure

• Connect a fuel pressure gauge to the fuel rail.
• Turn the ignition key to the "ON" position (do not start the engine) and check the pressure reading against manufacturer specifications (typically around 50-60 psi).
• If pressure is low, replace the fuel pump or fuel filter as necessary.

5. Replace Faulty Components

• If the ECT sensor is faulty, disconnect the wiring harness and replace the sensor.
• Reconnect all components, ensuring a snug fit.