why does my Renault Clio V (2019-Present) have a check engine light and poor fuel economy?

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the battery to ensure safety while working on electrical components.

2. Addressing Error Codes

• Sub-step 1: Use the OBD-II scanner to retrieve error codes.
• Sub-step 2: Research the codes to determine the specific issue (e.g., P0171 for a lean condition).
• Sub-step 3: Clear the codes and take the car for a short drive to see if they return.

3. Inspecting and Replacing Components

• Sub-step 1: For air intake issues, remove the air filter and check for cleanliness. Replace if dirty.
• Sub-step 2: Inspect the intake manifold for leaks, replace gaskets if necessary.
• Sub-step 3: If fuel injectors are clogged, perform a fuel injector cleaning or replace them if needed.
• Sub-step 4: Check and replace spark plugs if they show signs of wear, using the manufacturer's recommended type.
• Sub-step 5: Inspect vacuum hoses for cracks or disconnections and replace as necessary.

4. Testing the Fuel System

• Sub-step 1: Attach a fuel pressure gauge to the fuel rail and ensure pressure meets specifications.
• Sub-step 2: If the fuel pressure is low, replace the fuel pump.
• Sub-step 3: If injectors are faulty, replace them with OEM parts.