how to fix the P0171 code in my Honda Accord 10th Generation (2018-2022)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal.
• Allow engine to cool before starting work.

2. Inspect and Repair Air Intake System

• Sub-steps:
  • Visually inspect all intake hoses for cracks or loose connections.
  • Tighten any loose clamps and replace any damaged hoses.
• Tools Required: Socket set, screwdrivers

3. Clean or Replace MAF Sensor

• Sub-steps:
  • Remove the MAF sensor from the air intake duct.
  • Use a MAF sensor cleaner to clean the sensor elements.
  • If the sensor is damaged, replace it with a new one.
• Tools Required: Torx screwdriver, MAF sensor cleaner

4. Check Fuel System

• Sub-steps:
  • Use a fuel pressure gauge to check fuel pressure; it should be within manufacturer specifications.
  • If pressure is low, check the fuel pump and filter; replace them if necessary.
• Tools Required: Fuel pressure gauge, socket set

5. Inspect and Replace Oxygen Sensors

• Sub-steps:
  • Locate the upstream and downstream oxygen sensors.
  • Use an oxygen sensor socket to remove any faulty sensors.
  • Install new sensors and ensure they are properly secured.
• Tools Required: Oxygen sensor socket, torque wrench

6. Address Vacuum Leaks

• Sub-steps:
  • Perform a smoke test to identify any vacuum leaks.
  • Repair or replace any leaky vacuum hoses or gaskets.
• Tools Required: Smoke machine, basic hand tools