how to fix P0174 code in Honda Accord Eleventh Generation (2023-present)

Solution

1. Preparation

• Gather the necessary tools and parts.
• Disconnect the battery to prevent electrical shorts.
• Allow the engine to cool before starting work.

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, hose clamps, basic hand tools.
• Check all vacuum hoses for cracks or disconnections.
• Use a vacuum gauge to test the intake manifold for leaks.
• If leaks are found, replace the damaged hoses or tighten connections.

3. Fuel System Inspection

• Tools Required: Fuel pressure gauge, socket set.
• Locate the fuel rail and connect the fuel pressure gauge.
• Turn the ignition to the ON position (do not start) to check the fuel pressure.
• If the pressure is below specifications (typically 30-50 psi for most Honda models), replace the fuel pump or filter as needed.
• If pressure is adequate, proceed to inspect the fuel injectors.

4. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner (non-residue), screwdriver.
• Locate the MAF sensor and disconnect the electrical connector.
• Remove the MAF sensor from the air intake duct.
• Clean the sensor with MAF cleaner according to the manufacturer's instructions. Allow it to dry completely.
• Reinstall the sensor and reconnect the electrical connector.

5. Verify Engine Coolant Temperature Sensor

• Tools Required: Multimeter, socket set.
• Locate the engine coolant temperature sensor and disconnect the connector.
• Use a multimeter to check the resistance of the sensor at specific temperatures (refer to the service manual for specs).
• If the readings are out of specification, replace the coolant temperature sensor.