how to fix the P0171 code in my Honda Accord 10th Generation (2018-2022)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to avoid electrical shorts.
• Allow the engine to cool.

2. Inspect and Repair Air Intake System

• Remove the air filter and housing.
• Tools Required: Screwdriver, socket set.
• Inspect the air intake duct for cracks or loose connections. Replace as necessary.
• Reinstall the air filter and housing securely.

3. Clean the Mass Air Flow Sensor

• Locate the MAF sensor in the air intake duct.
• Remove the MAF sensor carefully.
• Tools Required: Torx or Phillips screwdriver.
• Use MAF sensor cleaner to spray the sensor elements. Do not touch them with fingers or tools.
• Allow the sensor to dry before reinstalling it.

4. Check Fuel Delivery System

• Connect a fuel pressure gauge to the fuel rail.
• Tools Required: Fuel pressure gauge, socket set.
• Turn the ignition to the "ON" position (do not start the engine) and check the fuel pressure against the specifications (usually around 40-50 PSI for most models).
• If pressure is low, inspect the fuel pump, fuel filter, and relay.

5. Inspect Vacuum Lines

• Visually inspect vacuum lines attached to the intake manifold for cracks or disconnections.
• Replace any damaged or brittle vacuum lines.

6. Check Intake Manifold

• If all previous checks are normal, inspect the intake manifold gaskets.
• Remove the intake manifold if necessary to check for leaks.
• Tools Required: Socket set, torque wrench.
• Replace the gaskets if leaks are found and reinstall the manifold, torquing bolts to manufacturer specifications.