how do I fix 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 required tools and parts.
• Ensure the vehicle is parked on a flat surface with the engine off and cooled down.
• Disconnect the negative battery terminal to ensure safety.

2. Inspect and Replace Spark Plug

• Remove the ignition coil from cylinder 1 by unscrewing the mounting bolts and disconnecting the electrical connector.
• Remove the spark plug using a spark plug socket and ratchet.
• Inspect the spark plug for wear, carbon buildup, or damage. Replace it if necessary.
• Install a new spark plug (Recommended gap: 0.8 mm) and torque it to 25 Nm (18 lb-ft) using a torque wrench.
• Reattach the ignition coil, ensuring the connector clicks into place.

3. Check and Replace Ignition Coil

• If the spark plug is in good condition, check the ignition coil for proper resistance using a multimeter (specifications may vary; consult service manual).
• If the ignition coil is faulty, replace it with a new one.
• Reinstall the ignition coil and reconnect the electrical connector.

4. Inspect Fuel Injector

• Remove the fuel injector connector from cylinder 1.
• Use a noid light to check for proper signal to the injector while cranking the engine.
• If the injector is not functioning, replace it by removing the fuel rail and replacing the injector.
• Reconnect all components and ensure there are no leaks.

5. Verify Engine Health

• Conduct a compression test on cylinder 1 and compare results to manufacturer specifications (usually around 10.5:1 for this engine).
• If compression is low, further investigation is necessary, which may include checking for valve issues or piston damage.