how to solve the P0174 lean code in Renault Clio V (2019-Present)?

Solution

1. Preparation

• Gather all necessary tools and parts before starting.
• Disconnect the battery to ensure safety while working on electrical components.

2. Inspect and Repair Air Intake System

• Tools Required: Socket set, torque wrench, vacuum gauge
• Check for any visible cracks or damage in the intake hose.
• If leaks are found, replace the hose or clamp as needed.
• Use a vacuum gauge to check for any leaks in the intake manifold.

3. Fuel Pressure Check

• Tools Required: Fuel pressure gauge
• Locate the fuel rail and connect the fuel pressure gauge.
• Turn the ignition to the "ON" position (without starting the engine) to check the fuel pressure.
• Compare the reading with manufacturer specifications (typically around 3.5 to 4.5 bar).
• If the pressure is low, inspect the fuel pump and fuel filter for issues and replace if necessary.

4. Clean or Replace MAF Sensor

• Tools Required: MAF cleaner, screwdriver
• Locate the MAF sensor in the air intake duct.
• Remove the sensor carefully and clean it with MAF cleaner; do not use other cleaners.
• If cleaning does not resolve the issue, replace the MAF sensor with a new one.

5. Inspect and Test Oxygen Sensors

• Tools Required: Multimeter, socket set
• Locate the upstream and downstream oxygen sensors.
• Use a multimeter to test the voltage output of the upstream sensor while the engine is running (should fluctuate between 0.1V to 0.9V).
• If not functioning properly, replace the sensor.