how to fix the misfire in my Renault Clio V (2019-Present) with P0303 code?

Learn how to diagnose and fix P0303 cylinder 3 misfire in Renault Clio V. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather required tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery to prevent electrical shorts or shocks.

2. Inspect and Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Locate the spark plug for cylinder three.
  3. Using a socket set, remove the spark plug.
  4. Inspect the spark plug for wear, carbon buildup, or damage.
  5. If faulty, replace the spark plug with a new one of the same specifications (check manufacturer recommendations).
  6. Torque the new spark plug to the manufacturer’s specified value (usually around 15 ft-lbs or according to specifications).

3. Inspect and Replace Ignition Coil

• Sub-steps:
  1. Disconnect the electrical connector from the ignition coil on cylinder three.
  2. Remove the ignition coil using a socket set.
  3. Inspect the ignition coil for damage or signs of arcing.
  4. If faulty, replace with a new ignition coil compatible with the Renault Clio V.
  5. Reinstall the ignition coil and reconnect the electrical connector.

4. Check Fuel Injector

• Sub-steps:
  1. Disconnect the fuel injector connector for cylinder three.
  2. Use a multimeter to test the resistance of the injector; compare it to specifications (typically around 12-16 ohms).
  3. If the injector is faulty, remove it and replace it with a new fuel injector.
  4. Reconnect the electrical connector and ensure it is secure.

5. Final Assembly

• Sub-steps:
  1. Reinstall any components removed during the inspection (e.g., engine cover).
  2. Reconnect the battery.
  3. Clear any existing codes from the vehicle’s computer using the OBD-II scanner.