how to fix P0171 code in Honda Accord 8th Generation (2008-2012)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the battery to ensure safety during repairs.

Tools Required:

• OBD-II scanner
• Socket set
• Screwdrivers
• Torque wrench
• Fuel pressure gauge
• MAF sensor cleaner

2. Inspect and Repair Intake System

• Sub-steps:
  1. Remove the air intake duct connected to the throttle body.
  2. Inspect for cracks or loose connections and replace any damaged components.
  3. Check the air filter and replace if it's dirty or clogged.

3. Check and Clean MAF Sensor

• Sub-steps:
  1. Disconnect the electrical connector from the MAF sensor.
  2. Remove the MAF sensor from the air intake assembly.
  3. Spray MAF sensor cleaner on the sensor elements and allow it to dry.
  4. Reinstall the MAF sensor and reconnect the electrical connector.

4. Fuel System Inspection

• Sub-steps:
  1. Use a fuel pressure gauge to check the fuel pressure while the engine is running.
  2. If pressure is low, check the fuel pump and replace it if necessary.
  3. Inspect fuel injectors for clogs; clean or replace as needed.

5. Vacuum Leak Check

• Sub-steps:
  1. Visually inspect all vacuum hoses connected to the intake manifold.
  2. Use a smoke machine or carburetor cleaner to test for leaks while the engine is running.
  3. Replace any leaking hoses or components.