my Honda CR-V Fifth Generation (2017-2022) has a P0171 code what does it mean

Solution

1. Preparation

• Tools Required: OBD-II scanner, fuel pressure gauge, MAF sensor cleaner, multimeter, socket set, vacuum gauge.
• 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 Air Intake System

• Sub-steps:
  1. Visually inspect all air intake hoses and connections for cracks or disconnections.
  2. Replace any damaged hoses with OEM parts.
  3. Check the intake manifold gasket; replace if there are signs of wear or leakage.

3. Test and Clean MAF Sensor

• Sub-steps:
  1. Disconnect the MAF sensor connector.
  2. Remove the sensor from the air intake housing using a socket set.
  3. Spray MAF cleaner on the sensor elements; do not touch them with fingers.
  4. Allow the sensor to dry completely before reinstalling.

4. Check and Repair Fuel System

• Sub-steps:
  1. Connect the fuel pressure gauge to the fuel rail and turn the ignition to the ON position (do not start the engine); check the fuel pressure reading.
  2. If the pressure is low, inspect the fuel pump and filter; replace the fuel filter if clogged.
  3. If injectors are suspected, remove them and clean with an ultrasonic cleaner or replace if necessary.

5. Reassemble and Test

• Sub-steps:
  1. Reconnect all components removed during inspection and repairs.
  2. Reconnect the negative battery terminal.
  3. Start the vehicle and allow it to reach operating temperature while observing for any abnormal noises or leaks.