how to fix P0174 code in Honda Civic 11th Generation (2022-Present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety while working on electrical components.

2. Inspect and Replace Air Filter

• Tools Required: Screwdriver or pliers (depending on clips or screws)
• Remove the air filter housing cover.
• Inspect the air filter; if dirty or clogged, replace it with a new one.
• Reassemble the air filter housing cover securely.

3. Check and Repair Vacuum Leaks

• Tools Required: Smoke machine or carburetor cleaner (for testing)
• Use a smoke machine to introduce smoke into the intake system while the engine is running. Observe for any smoke escaping, indicating a vacuum leak.
• If a leak is found, replace or repair the damaged hose or gasket as necessary.

4. Test and Clean MAF Sensor

• Tools Required: MAF sensor cleaner or electrical contact cleaner
• Disconnect the MAF sensor connector and remove the sensor from the intake.
• Clean the MAF sensor with the appropriate cleaner, avoiding contact with the sensor element.
• Reinstall the MAF sensor and reconnect the electrical connector.

5. Fuel Pressure Test and Injector Cleaning

• Tools Required: Fuel pressure gauge, fuel injector cleaning kit
• Connect the fuel pressure gauge to the fuel rail and turn the ignition to the "ON" position (do not start the engine) to check the fuel pressure.
• If the pressure is below specifications, inspect the fuel pump and filter for issues.
• If injectors are clogged, use an injector cleaning kit per manufacturer instructions to clean them.

6. Reconnect Battery and Clear Codes

• Reconnect the battery terminals.
• Use the OBD-II scanner to clear the P0174 code and any other codes present.