how to fix the P0301 misfire 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 tools and parts needed for the repair.
• Disconnect the negative battery terminal to ensure safety while working on electrical components.

2. Replace Spark Plug in Cylinder 1

• Tools Required: Spark plug socket, ratchet, torque wrench
• Remove the engine cover if necessary to access the spark plug.
• Unscrew the spark plug using the spark plug socket.
• Inspect the old spark plug for signs of wear (e.g., carbon buildup, electrode damage).
• Install the new spark plug and torque it to the manufacturer's specifications (typically around 20-25 Nm).

3. Inspect and Replace Ignition Coil (if necessary)

• Tools Required: Socket set, torque wrench
• Disconnect the ignition coil connector and remove the retaining bolts.
• Carefully pull the ignition coil out of the cylinder head.
• Inspect the ignition coil for cracks or damage.
• If damaged, replace it with a new coil, ensuring it is seated properly. Torque the bolts to the manufacturer's specifications.

4. Test Fuel Injector Function

• Tools Required: Noid light or multimeter
• Disconnect the fuel injector connector for cylinder 1.
• Connect the noid light or multimeter to check for proper electrical signal when the engine is cranked.
• If the injector is not receiving power, trace back to the wiring or ECM.
• If the injector is faulty, replace it with a new unit.

5. Check Engine Compression

• Tools Required: Compression tester
• Remove the spark plug from cylinder 1.
• Insert the compression tester into the spark plug hole.
• Crank the engine and record the compression reading.
• Compare the reading against manufacturer specifications; if low, further engine diagnostics may be required.