how to fix P0301 code misfire on 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 necessary tools and parts.
• Disconnect the vehicle's battery to ensure safety.
• Raise the front of the vehicle using a jack if necessary for access.

2. Replace Spark Plug

• Remove the ignition coil from cylinder 1:
  • Unscrew any retaining bolts using a socket set.
  • Carefully pull the ignition coil off the spark plug.
• Remove the spark plug:
  • Use a spark plug socket and ratchet to unscrew the spark plug from the cylinder head.
• Install a new spark plug:
  • Check the gap on the new spark plug and adjust if necessary (typically 0.7-0.8 mm for Clio).
  • Apply anti-seize compound to the threads (optional) and install it in the cylinder head.
  • Torque the spark plug to the manufacturer’s specification (usually around 20 Nm).
• Reinstall the ignition coil and secure it with the retaining bolts.

3. Replace Ignition Coil (if necessary)

• If the ignition coil was found to be defective:
  • Disconnect the electrical connector from the ignition coil.
  • Remove the ignition coil as described above.
  • Install a new ignition coil ensuring it fits securely.
  • Reconnect the electrical connector.

4. Check/Replace Fuel Injector (if necessary)

• Remove the fuel rail (if access is required):
  • Relieve fuel pressure by removing the fuel pump fuse and running the engine until it stalls.
  • Disconnect the fuel line and any electrical connectors.
  • Unscrew the fuel rail bolts and gently lift it off.
• Inspect the fuel injector for cylinder 1 for clogs or damage:
  • Replace the fuel injector if necessary using a new O-ring.
  • Reinstall the fuel rail and reconnect all components.