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

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Repair Intake System

• Sub-steps:
  1. Remove the engine cover (if applicable) using a socket set.
  2. Visually inspect the intake manifold and associated vacuum hoses for cracks or disconnections.
  3. Use a smoke machine or soapy water to detect any air leaks. Repair or replace any faulty components.
• Tools Required: Socket set, smoke machine, soapy water solution.

3. Clean or Replace MAF Sensor

• Sub-steps:
  1. Locate the MAF sensor in the air intake system.
  2. Disconnect the electrical connector and remove the sensor using a Torx screwdriver.
  3. Clean the sensor with MAF sensor cleaner. If heavily damaged, replace it with a new unit.
  4. Reinstall the sensor and reconnect the electrical connector.
• Tools Required: Torx screwdriver, MAF sensor cleaner.

4. Test and Repair Fuel System

• Sub-steps:
  1. Connect a fuel pressure gauge to the fuel rail to check the pressure.
  2. If pressure is below specification, inspect the fuel pump and fuel filter for clogs or failures.
  3. Replace the fuel filter if necessary and, if the pump is faulty, replace it as well.
• Tools Required: Fuel pressure gauge, socket set.

5. Check and Replace Oxygen Sensors

• Sub-steps:
  1. Using an O2 sensor socket, remove the upstream oxygen sensor.
  2. Inspect the sensor for contamination or damage.
  3. If necessary, replace the sensor with a new one and ensure it is torqued to specifications.
  4. Reconnect the electrical connector.
• Tools Required: O2 sensor socket, torque wrench.