how to fix P0171 code on Renault Clio V (2019-Present)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the battery to prevent electrical issues during repairs.

2. Inspect and Repair Air Intake System

• Sub-steps:
  1. Remove the engine cover (if applicable) using a socket set.
  2. Inspect the air intake hose and connections for leaks or cracks.
  3. Replace any damaged hoses with new ones.
  4. Reinstall the engine cover.

3. Test and Replace Fuel Pressure Regulator (if necessary)

• Sub-steps:
  1. Connect a fuel pressure gauge to the fuel rail.
  2. Turn the ignition to the ON position without starting the engine and check the fuel pressure.
  3. If pressure is below specifications (typically around 3-4 bar), replace the fuel pressure regulator.
  4. Disconnect the fuel lines and remove the regulator, then install the new regulator and reconnect lines.

4. Clean or Replace MAF Sensor

• Sub-steps:
  1. Locate the MAF sensor in the air intake path.
  2. Disconnect the electrical connector and remove the sensor.
  3. Clean the MAF sensor using MAF cleaner spray; do not touch the sensor with fingers.
  4. If damaged, replace the MAF sensor with a new unit.
  5. Reinstall the MAF sensor and reconnect the electrical connector.

5. Inspect and Test Fuel Injectors

• Sub-steps:
  1. Remove the fuel injector rail using a socket set.
  2. Inspect the injectors for clogs or leaks.
  3. Clean the injectors using a fuel injector cleaner or replace them if necessary.
  4. Reinstall the injector rail and ensure all connections are secure.

6. Check and Replace Oxygen Sensors (if needed)

• Sub-steps:
  1. Locate the upstream oxygen sensor (usually before the catalytic converter).
  2. Disconnect the electrical connector and unscrew the sensor using an oxygen sensor socket.
  3. Install a new oxygen sensor and reconnect it.
  4. Clear diagnostic codes using the OBD-II scanner.