how to fix a misfire in my Renault Clio V (2019-Present) with code P0301

Learn how to diagnose and fix P0301 cylinder 1 misfire in Renault Clio V. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, compression tester, fuel pressure gauge, multimeter, noid light.
• Ensure the engine is cool and the vehicle is in a safe working position.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench.
  1. Remove the engine cover (if applicable) using a socket wrench.
  2. Disconnect the ignition coil connector from the ignition coil of cylinder 1.
  3. Remove the ignition coil using the socket set.
  4. Unscrew and remove the spark plug from cylinder 1.
  5. Check the old spark plug for signs of wear (such as carbon buildup or damage).
  6. Install the new spark plug, hand-tighten it, then torque to the manufacturer’s specifications (typically around 20-25 Nm).
  7. Reattach the ignition coil and connector.

3. Replace Ignition Coil (if necessary)

• Tools Required: Socket set.
  1. If the ignition coil appears damaged or faulty, remove it as described above.
  2. Install the new ignition coil for cylinder 1.
  3. Reconnect the ignition coil connector and ensure it clicks into place.

4. Test Fuel Injector

• Tools Required: Noid light.
  1. Disconnect the fuel injector connector for cylinder 1.
  2. Connect the noid light to the fuel injector harness.
  3. Crank the engine to see if the noid light flashes, indicating injector operation.
  4. If the injector is not firing, replace the fuel injector.

5. Clear Codes and Test Drive

• Tools Required: OBD-II scanner.
  1. Reconnect the negative battery terminal.
  2. Use the OBD-II scanner to clear the P0301 code.
  3. Start the engine and observe if the check engine light remains off.
  4. Take the vehicle for a test drive to ensure the misfire issue has been resolved.