my Honda Civic 11th Generation (2022-Present) has a P0171 code, what does that indicate?

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Ensure the vehicle is in a safe and stable environment (parked on a level surface).
• Disconnect the battery to avoid electrical shorts.

2. Inspect and Repair Vacuum Leaks

• Sub-steps:
  • Visually inspect all hoses connected to the intake manifold for signs of wear or damage.
  • Perform a smoke test to identify any hidden leaks in the intake system.
  • Replace any damaged hoses or components with OEM parts.
• Tools Required: Smoke machine (if performing smoke test), hose clamps, replacement hoses.

3. Clean or Replace MAF Sensor

• Sub-steps:
  • Locate the MAF sensor in the air intake duct.
  • Disconnect the electrical connector and carefully remove the sensor.
  • Clean the sensor using MAF cleaner spray; allow it to dry before reinstalling.
  • If damaged, replace the MAF sensor with a new one.
• Tools Required: MAF cleaner spray, screwdrivers.

4. Check and Adjust Fuel Pressure

• Sub-steps:
  • Connect the fuel pressure gauge to the fuel rail.
  • Start the engine and check the fuel pressure; it should be within the specified range.
  • If pressure is low, inspect the fuel pump and filter for issues; replace as necessary.
• Tools Required: Fuel pressure gauge, wrenches.

5. Verify and Clean Fuel Injectors

• Sub-steps:
  • Remove the fuel injectors from the fuel rail.
  • Clean the injectors using an ultrasonic cleaner or replace them if clogged or malfunctioning.
  • Reinstall the injectors ensuring proper sealing and connection.
• Tools Required: Ultrasonic cleaner (if cleaning), O-rings, fuel injector puller.