how to fix P0300 random misfire code Renault Clio V (2019-Present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shocks.
• Allow the engine to cool before starting work.

2. Inspect and Replace Spark Plugs

• Remove the ignition coils by unscrewing the bolts and gently pulling them out.
• Carefully remove the spark plugs using a spark plug socket and ratchet.
• Inspect the spark plugs for signs of wear or fouling; replace with OEM spark plugs if needed.
• Torque the new spark plugs to manufacturer specifications (typically around 15-20 Nm).

3. Check and Replace Ignition Coils

• If the coils show signs of damage or malfunction, replace them.
• Disconnect the electrical connectors and remove each coil by unscrewing.
• Install the new ignition coils and reconnect the electrical connectors, ensuring they click into place.

4. Inspect Fuel Injectors

• Remove the fuel rail (if necessary) to access the injectors.
• Check for clogs or leaks in the injectors. If faulty, replace with new OEM injectors.
• Reinstall the fuel rail and ensure all connections are secure.

5. Check for Vacuum Leaks

• Inspect all vacuum lines connected to the intake manifold for cracks or disconnections.
• Use a smoke machine or carburetor cleaner to detect leaks while the engine is running.
• Repair or replace any damaged lines.