my Renault Clio V (2019-Present) has a P0171 code, what does this mean?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety during repairs.

2. Inspect and Repair Air Intake System

• Remove the engine cover (if applicable) using a socket set.
• Inspect the air intake hose for cracks or looseness; replace it if damaged.
• Check the intake manifold for vacuum leaks and reseal using appropriate gasket material if necessary.

3. Test and Replace MAF Sensor

• Disconnect the MAF sensor connector.
• Using a multimeter, measure the voltage output while the engine is running to verify proper function (Refer to the service manual for specific voltage readings).
• If the MAF sensor is faulty, replace it by unbolting it from the air intake duct and installing a new unit.

4. Fuel System Inspection

• Connect the fuel pressure gauge to the fuel rail.
• Turn the ignition to the ON position (without starting the engine) to check fuel pressure; it should match manufacturer specifications (typically around 40-55 PSI for many models).
• If fuel pressure is low, inspect the fuel pump and filter for clogs or failures; replace as necessary.

5. Clean or Replace Fuel Injectors

• If injectors are suspected to be clogged, remove them using a socket set and inspect visually.
• Clean them using a fuel injector cleaning kit or replace them if they show signs of failure.