how to fix P0301 code in 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 tools and parts needed for the repair.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool completely.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the ignition coil cover if applicable.
• Disconnect the ignition coil connector and remove the ignition coil from cylinder 1.
• Remove the spark plug using a spark plug socket.
• Inspect the spark plug for wear (electrode condition, carbon buildup).
• If damaged, replace it with a new spark plug, ensuring it matches the manufacturer's specifications.
• Torque the spark plug to the recommended specification (typically 15-20 Nm).

3. Inspect and Replace Ignition Coil

• If the spark plug is in good condition, inspect the ignition coil.
• Tools Required: Socket set, torque wrench.
• Replace the ignition coil if it shows signs of damage or wear.
• Reinstall the ignition coil, ensuring it is seated correctly and torque it to the manufacturer's specifications.

4. Check Fuel Injector Operation

• Tools Required: Fuel injector tester or multimeter.
• Disconnect the fuel injector connector for cylinder 1.
• Use a fuel injector tester to check for proper operation or resistance.
• Replace the fuel injector if it is faulty.

5. Perform Compression Test

• Tools Required: Compression tester.
• Reinstall the spark plug and ignition coil for cylinder 1.
• Remove the fuel pump fuse to prevent fuel delivery during the test.
• Disconnect the ignition coil connector.
• Insert the compression tester into the spark plug hole and crank the engine.
• Compare the compression reading to the manufacturer's specifications (usually around 200 psi).
• If the compression is low, further investigation is needed for possible internal engine issues.