how to fix P0174 code in Renault Clio V (2019-Present)

Solution

1. Preparation

• Tools Required: OBD-II scanner, vacuum gauge, fuel pressure gauge, socket set, torque wrench, multimeter, cleaning supplies.
• Safety Warnings: Disconnect the battery before working on electrical systems. Allow the engine to cool before inspecting components.

2. Inspect and Repair Vacuum Leaks

• Sub-steps:
  1. Perform a visual inspection of all vacuum hoses connected to the intake manifold and the throttle body.
  2. Use a vacuum gauge to check for leaks; if the gauge shows low readings, there may be a leak present.
  3. Tighten or replace any loose or damaged hoses and gaskets.

3. Clean or Replace the MAF Sensor

• Sub-steps:
  1. Disconnect the MAF sensor electrical connector.
  2. Remove the MAF sensor from the intake duct using a socket set.
  3. Clean the MAF sensor with MAF sensor cleaner; do not use any other cleaning agents.
  4. Allow it to dry completely before reinstallation.
  5. Reinstall the MAF sensor and reconnect the electrical connector.

4. Check and Repair Fuel Pressure

• Sub-steps:
  1. Connect the fuel pressure gauge to the fuel rail service port.
  2. Turn the ignition to the "ON" position (do not start the engine) and read the pressure.
  3. If the pressure is below specifications (check manufacturer specifications), test the fuel pump and replace if necessary.
  4. If the fuel pump is functioning properly, inspect the fuel filter for clogs and replace if necessary.

5. Inspect Fuel Injectors

• Sub-steps:
  1. Remove the fuel rail from the engine, taking care to prevent fuel spillage.
  2. Inspect each injector for clogs or leaks; clean injectors using a suitable cleaning kit or replace them if damaged.
  3. Reinstall the fuel rail and ensure all connections are snug.