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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical short circuits.
• Allow the engine to cool down if it was recently running.

2. Inspect and Repair Air Intake System

• Sub-steps:
  • Visually inspect all vacuum hoses and intake ducts for cracks or disconnections.
  • Replace any damaged hoses or gaskets with OEM parts.
  • Tighten any loose clamps on the intake system.

3. Clean or Replace MAF Sensor

• Sub-steps:
  • Locate the MAF sensor near the air intake filter.
  • Carefully disconnect the electrical connector.
  • Remove the MAF sensor using a Torx screwdriver.
  • Clean the sensor with MAF cleaner spray or replace it if damaged.
  • Reinstall the sensor and reconnect the electrical connector.

4. Check and Adjust Fuel System

• Sub-steps:
  • Connect a fuel pressure gauge to the fuel rail.
  • Turn the ignition to the "ON" position without starting the engine and check the fuel pressure.
  • Compare the reading to the manufacturer’s specification (usually around 3-4 bar for most vehicles).
  • If the pressure is low, check for a clogged fuel filter or failing fuel pump and replace if necessary.

5. Inspect and Clean Fuel Injectors

• Sub-steps:
  • Remove the fuel rail to access the injectors.
  • Check for any signs of clogging or damage on each injector.
  • Use an injector cleaning kit to clean them or replace them if necessary.
  • Reinstall the fuel rail and reconnect all hoses.