why does my Renault Clio V (2019-Present) check engine light keep coming on

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery before performing any electrical repairs.

2. Address OBD-II Error Codes

• Sub-steps:
  • Use the OBD-II scanner to retrieve trouble codes.
  • Research codes to understand the specific issues (e.g., P0420 for catalytic converter inefficiency).
  • Clear the codes and observe if the light returns.

3. Inspect and Replace Gas Cap

• Sub-steps:
  • Remove the gas cap and inspect for cracks or wear.
  • Clean the sealing surface on the fuel filler neck.
  • Replace the gas cap with an OEM part if defective.

4. Check Engine Oil

• Sub-steps:
  • Remove the dipstick and check oil level and condition.
  • If low, add the recommended oil type (check owner’s manual).
  • If oil is dirty, perform an oil change.

5. Air Intake Inspection

• Sub-steps:
  • Remove the air filter and inspect for dirt or blockages; replace if necessary.
  • Check the intake hoses for cracks or loose connections and replace them as needed.

6. Fuel System Pressure Test

• Sub-steps:
  • Connect a fuel pressure gauge to the fuel rail.
  • Turn the ignition to the "ON" position without starting the engine to check pressure.
  • Compare readings to manufacturer specifications; replace the fuel pump if pressure is inadequate.