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

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

• Gather the necessary tools and parts.
• Disconnect the battery to prevent electrical shorts.

2. Replace Spark Plug

• Sub-steps:
  1. Remove the ignition coil from cylinder 1 by unscrewing it and disconnecting the electrical connector.
  2. Using a spark plug socket, remove the old spark plug from cylinder 1.
  3. Inspect the spark plug threads and clean if necessary.
  4. Install the new spark plug, ensuring it is gapped correctly (typically 0.7mm for the Clio).
  5. Torque the spark plug to the manufacturer's specification (usually around 25 Nm).
  6. Reinstall the ignition coil and reconnect the electrical connector.

3. Replace Ignition Coil (if necessary)

• Sub-steps:
  1. If the ignition coil is faulty, remove it from its mounting location.
  2. Disconnect the electrical connector from the ignition coil.
  3. Install the new ignition coil, ensuring it is seated correctly.
  4. Reconnect the electrical connector and secure the ignition coil in place.

4. Clean or Replace Fuel Injector (if necessary)

• Sub-steps:
  1. Disconnect the fuel line and electrical connector from the fuel injector for cylinder 1.
  2. Remove the fuel injector from its rail.
  3. Clean the injector using a fuel injector cleaner or replace it if clogged.
  4. Reinstall the injector, ensuring it is seated properly.
  5. Reconnect the fuel line and electrical connector.

5. Final Checks

• Reconnect the battery.
• Clear any error codes using the OBD-II scanner.

Tools Required:

• OBD-II scanner
• Spark plug socket
• Torque wrench
• Screwdrivers
• Pliers
• Fuel injector cleaner (if cleaning)

Parts Required:

• New spark plug
• New ignition coil (if needed)
• New fuel injector (if needed)

Estimated Repair Time: 2-4 hours

Safety Warnings:

• Disconnect the battery before working on electrical systems.
• Allow the engine to cool completely before working on it to avoid burns.