how to resolve the P0171 code on my Renault Clio V (2019-Present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery before starting work on the vehicle.

2. Inspect and Repair Air Intake System

• Sub-steps:
  1. Visually inspect the air intake hoses and connections for cracks or disconnections.
  2. Replace any damaged hoses or seals.
  3. Use a smoke machine if available to detect hard-to-find leaks.

3. Clean the Mass Airflow Sensor (MAF)

• Tools Required: MAF cleaner spray
• Sub-steps:
  1. Locate the MAF sensor on the air intake system.
  2. Carefully disconnect the electrical connector and remove the sensor.
  3. Spray the MAF cleaner onto the sensor and let it dry completely before reinstalling.
  4. Reconnect the MAF sensor and ensure it is securely fastened.

4. Check and Replace Fuel Filter (if necessary)

• Sub-steps:
  1. Locate the fuel filter, typically found along the fuel line.
  2. Relieve fuel system pressure by removing the fuel pump relay and starting the engine until it stalls.
  3. Disconnect the fuel lines from the filter carefully.
  4. Install the new filter ensuring correct orientation and secure connections.

5. Test and Replace Fuel Injectors (if necessary)

• Sub-steps:
  1. Connect a fuel pressure gauge to the fuel rail.
  2. Start the engine and monitor fuel pressure; it should meet manufacturer specifications.
  3. If pressure is low, consider replacing the fuel injectors.
  4. Remove and replace the injectors using a compatible O-ring lubricant.