how to resolve 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 parts.
• Ensure the vehicle is parked on a level surface, and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shocks.

2. Replace Spark Plug

• Remove the ignition coil from cylinder 1 by unbolting it and gently pulling it out.
• Unscrew the spark plug using a spark plug socket and ratchet.
• Inspect the old spark plug for damage or fouling.
• Install a new spark plug, ensuring it is gapped correctly as per manufacturer specifications (typically around 0.8-1.0 mm).
• Torque the spark plug to the manufacturer-recommended specifications (usually around 20 Nm).
• Reinstall the ignition coil.

3. Inspect and Replace Ignition Coil

• If the spark plug is fine, test the ignition coil using a multimeter to check for resistance.
• If the ignition coil is faulty, remove it and replace it with a new one.
• Reinstall the ignition coil after ensuring a secure fit.

4. Check and Clean Fuel Injector

• If misfire persists, remove the fuel injector from cylinder 1.
• Clean the injector using a specialized fuel injector cleaner or replace it if it’s damaged.
• Reinstall the fuel injector ensuring it is properly seated and sealed.

5. Conduct Compression Test

• If issues continue, perform a compression test on cylinder 1.
• If compression is low, further investigation may be needed for internal engine issues such as valve or piston damage.