how to fix P0174 code in Honda Accord 9th Generation (2013-2017)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, hose clamps, screwdriver
• Inspect all vacuum lines and intake manifold gaskets for cracks or disconnections.
• Use a vacuum gauge to check if the engine is maintaining proper vacuum.
• Replace any damaged hoses or gaskets as needed.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, screwdriver
• Remove the MAF sensor from the air intake duct.
• Clean the sensor using MAF sensor cleaner, avoiding contact with the sensor element.
• Reinstall the MAF sensor securely. If defective, replace with a new unit.

4. Check and Adjust Fuel Pressure

• Tools Required: Fuel pressure gauge, automotive manual for specifications
• Attach a fuel pressure gauge to the fuel rail test port.
• Turn the ignition to the "ON" position (do not start) and check the fuel pressure.
• If pressure is below specifications, inspect the fuel pump and filter for issues and replace as necessary.

5. Inspect Fuel Injectors

• Tools Required: Multimeter, fuel injector cleaning kit
• Check each fuel injector's resistance using a multimeter; compare readings to manufacturer specifications.
• If injectors are clogged, use a fuel injector cleaning kit or replace them as needed.

6. Examine Exhaust System

• Tools Required: Visual inspection tools, smoke tester (optional)
• Inspect the exhaust system for any leaks, particularly around the manifold and oxygen sensors.
• Use a smoke tester to identify any hidden leaks, and repair or replace components as necessary.