how to fix the P0301 misfire code 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 materials.
• Disconnect the battery (negative terminal) to ensure safety during repairs.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the ignition coil by unscrewing it from the cylinder head.
• Extract the old spark plug using a spark plug socket.
• Inspect the spark plug threads for damage and clean if necessary.
• Install the new spark plug to the manufacturer-recommended torque (typically 15-20 lb-ft).
• Reinstall the ignition coil and secure it properly.

3. Replace Ignition Coil (if necessary)

• Tools Required: Socket set, torque wrench.
• Disconnect the electrical connector from the ignition coil.
• Remove the ignition coil by unscrewing it from the cylinder head.
• Install the new ignition coil and tighten to the specified torque.
• Reconnect the electrical connector.

4. Clean or Replace Fuel Injector (if necessary)

• Tools Required: Fuel injector cleaner or replacement injector, hand tools.
• Remove the fuel rail if required to access the injector.
• Clean the injector using a cleaning kit or replace with a new one.
• Reassemble the fuel rail and ensure all connections are secure.

5. Check for Vacuum Leaks

• Inspect hoses and gaskets around the intake manifold.
• Replace any damaged hoses or gaskets as necessary.
• Use a smoke machine to detect leaks if available.

6. Perform Compression Test (if misfire persists)

• Tools Required: Compression tester.
• Remove spark plugs from all cylinders.
• Insert the compression tester into cylinder 1.
• Crank the engine and record the compression reading.
• Compare the reading with manufacturer specifications. If low, further investigation is needed.