how to fix P0174 code on Honda Accord 8th Generation (2008-2012)

Solution

1. Preparation

• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Repair Vacuum Leaks

• Inspect hoses: Visually inspect all vacuum hoses for cracks, leaks, or disconnections. Replace any damaged hoses.
• Check gaskets: Examine the intake manifold and throttle body gaskets for signs of wear or damage. Replace if necessary.

3. Clean or Replace MAF Sensor

• Remove MAF sensor: Disconnect the electrical connector and remove the MAF sensor from the air intake duct.
• Clean or replace: Use MAF sensor cleaner to gently clean the sensor. If damaged, replace with a new sensor.
• Reinstall: Reattach the MAF sensor and reconnect the electrical connector.

4. Check and Adjust Fuel Pressure

• Connect fuel pressure gauge: Locate the fuel rail and connect the gauge to the service port.
• Check pressure reading: Verify that the fuel pressure is within the acceptable range specified in the service manual (typically 30-40 psi).
• Replace fuel pump or filter if necessary: If the pressure is low, inspect the fuel pump and filter for blockage or failure.

5. Inspect Fuel Injectors

• Remove injectors: If necessary, remove the fuel rail and injectors from the engine.
• Clean injectors: Use an ultrasonic cleaner or injector cleaning kit to clean the fuel injectors.
• Reinstall: Reinstall the injectors and ensure all connections are tight.

6. Clear Codes and Test

• Reconnect battery: Reattach the negative battery terminal.
• Clear codes: Use the OBD-II scanner to clear the P0174 code.
• Test drive the vehicle: Monitor for any reoccurrence of the check engine light.