how to fix P0174 code in Honda Accord 10th Generation (2018-2022)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool down before starting any work.

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge or smoke machine, basic hand tools
• Use a vacuum gauge to check for leaks in the intake system.
• If using a smoke machine, introduce smoke into the intake system and observe for escaping smoke.
• Repair or replace any damaged hoses or components found during inspection.

3. Clean the MAF Sensor

• Tools Required: MAF cleaner spray, soft cloth
• Remove the MAF sensor from the air intake duct.
• Spray MAF cleaner on the sensor elements and allow it to dry thoroughly before reinstalling.
• Reattach the MAF sensor securely.

4. Test Fuel Pressure

• Tools Required: Fuel pressure gauge
• Locate the fuel rail and connect the fuel pressure gauge to the test port.
• Start the engine and observe the fuel pressure reading; it should match manufacturer specifications (typically between 40-50 PSI).
• If pressure is low, inspect the fuel pump and filter for issues and replace as necessary.

5. Inspect and Clean Fuel Injectors

• Tools Required: Fuel injector cleaner or ultrasonic cleaner, hand tools
• Remove the fuel injectors from the fuel rail.
• Clean the injectors using a proper fuel injector cleaner or ultrasonic cleaner.
• Reinstall the injectors and ensure they are seated correctly.

6. Replace Faulty Components

• If any faulty components were identified (e.g., vacuum hoses, MAF sensor, fuel injectors), replace them with OEM or quality aftermarket parts.
• Reassemble all components securely.