how to fix P0174 code in Honda Accord 10th Generation (2018-2022)

Solution

1. Preparation

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

2. Inspect and Repair Vacuum Leaks

• Sub-steps:

  1. Visually inspect all vacuum hoses connected to the intake manifold for cracks or disconnections.
  2. Use a smoke machine to detect any hidden leaks in the intake system.
  3. Replace any damaged hoses or gaskets found during inspection.

• Tools Required: Smoke machine, vacuum gauge, socket set.

3. Clean or Replace MAF Sensor

• Sub-steps:

  1. Locate the MAF sensor on the air intake duct.
  2. Disconnect the electrical connector and remove the sensor from the duct.
  3. Clean the MAF sensor with MAF sensor cleaner or replace it if it is malfunctioning.
  4. Reinstall the sensor and reconnect the electrical connector.

• Tools Required: Torx screwdriver or socket, MAF sensor cleaner.

4. Inspect and Test Fuel Delivery System

• Sub-steps:

  1. Check the fuel pump's operation by listening for its sound during ignition.
  2. Use a fuel pressure gauge to measure the fuel pressure at the fuel rail and compare it to manufacturer specifications.
  3. If the fuel pressure is low, replace the fuel filter and check the fuel pump for faults.

• Tools Required: Fuel pressure gauge, socket set.

5. Check Oxygen Sensors

• Sub-steps:

  1. Locate the upstream and downstream oxygen sensors on bank 2.
  2. Use a multimeter to test the functionality of the downstream oxygen sensor.
  3. Replace the oxygen sensor if it shows signs of failure or does not provide a proper reading.

• Tools Required: Multimeter, oxygen sensor socket.