how to fix P0171 code on Honda CR-V Sixth Generation (2023-present)

Solution

1. Preparation

• Gather tools and parts.
• Disconnect the battery to prevent electrical shorts.
• Allow the engine to cool down before beginning work.

2. Inspect and Repair Intake System

• Sub-step 1: Visually inspect all vacuum hoses for cracks or disconnections. Replace any damaged hoses.
• Sub-step 2: Check the intake manifold gasket for leaks. If damaged, replace it.
• Tools Required: Screwdrivers, pliers.

3. Check and Clean MAF Sensor

• Sub-step 1: Remove the MAF sensor from the intake duct.
• Sub-step 2: Clean the sensor using MAF cleaner spray. Do not touch the sensor element.
• Sub-step 3: Reinstall the MAF sensor securely.
• Tools Required: Torx screwdriver or socket set.

4. Test Fuel Pressure

• Sub-step 1: Connect a fuel pressure gauge to the fuel rail.
• Sub-step 2: Turn on the ignition without starting the engine to check the initial fuel pressure.
• Sub-step 3: Start the engine and compare the readings to manufacturer specifications (typically around 30-40 psi).
• Sub-step 4: If pressure is low, inspect the fuel filter and fuel pump for issues and replace if necessary.
• Tools Required: Fuel pressure gauge.

5. Inspect Fuel Injectors

• Sub-step 1: Check for any visible leaks around the injectors.
• Sub-step 2: If necessary, remove the fuel rail and inspect or clean the injectors using an ultrasonic cleaner or replace them if faulty.
• Tools Required: Socket set, ultrasonic cleaner (if cleaning).

6. Reconnect Battery and Clear Codes

• Sub-step 1: Reconnect the battery terminals.
• Sub-step 2: Use the OBD-II scanner to clear the P0171 code from the ECM.
• Tools Required: OBD-II scanner.