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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to prevent any electrical shorts.
• Ensure the vehicle is parked on a level surface and the engine is cool.

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, hose clamp pliers
• Use a vacuum gauge to check for leaks in the intake system.
• Inspect all hoses and connections visually for cracks or disconnections.
• Replace any damaged hoses or tighten loose connections.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, Torx screwdriver
• Locate the MAF sensor along the intake duct.
• Disconnect the electrical connector and the air intake duct.
• Spray the MAF sensor with MAF sensor cleaner and allow it to dry completely.
• Reinstall the sensor and reattach the air intake duct and electrical connector.

4. Check Fuel System Pressure

• Tools Required: Fuel pressure gauge
• Locate the fuel rail test port and attach the fuel pressure gauge.
• Turn the ignition on (do not start the engine) and check fuel pressure against the manufacturer’s specifications.
• If pressure is low, inspect the fuel pump and filter; replace if necessary.

5. Inspect and Test Fuel Injectors

• Tools Required: Multimeter, fuel injector cleaning kit
• Use a multimeter to test for electrical continuity at each fuel injector.
• If injectors are clogged, remove them and clean using a fuel injector cleaning kit.
• Reinstall the injectors and ensure all connections are secure.