how to fix a P0301 code on 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 battery to prevent electrical shorts.
• Ensure the engine is cool before starting work.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, spark plug socket, torque wrench.
• Remove the ignition coil cover if applicable.
• Unplug the ignition coil connector and remove the ignition coil from cylinder 1.
• Remove the spark plug using the spark plug socket.
• Inspect the spark plug for signs of wear or fouling.
• If damaged, replace it with a new spark plug, ensuring it meets the manufacturer’s specifications (usually around 0.8 mm gap).
• Torque the new spark plug to the manufacturer's specification (typically around 25 Nm).

3. Check and Replace Ignition Coil

• If the spark plug was fine, test the ignition coil for proper operation using a multimeter.
• If faulty, install a new ignition coil specific to the Renault Clio V.
• Reinstall the ignition coil and connect the electrical connector.

4. Inspect and Clean Fuel Injector

• If the ignition components are functioning correctly, check the fuel injector.
• Disconnect the fuel injector connector and remove the injector from the rail.
• Clean the injector using a professional fuel injector cleaner or replace it if it’s clogged or faulty.
• Reinstall the cleaned or new injector ensuring it is seated properly.

5. Compression Test (if required)

• If misfire persists, perform a compression test on cylinder 1.
• Follow manufacturer guidelines for the compression test procedure.
• If compression is low, further investigation into internal engine components (valves, piston rings) may be necessary.