how to fix P0301 misfire 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 all tools and parts required for the repair.
• Disconnect the battery to ensure safety while working on electrical components.
• Allow the engine to cool before proceeding with any disassembly.

2. Replace Spark Plug

• Remove the engine cover (if applicable) using a socket set.
• Disconnect the ignition coil connector for cylinder 1.
• Unscrew the ignition coil from the cylinder head and carefully remove it.
• Extract the spark plug using a spark plug socket.
• Install the new spark plug, tightening to the manufacturer's specified torque (typically around 20 Nm).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Test and Replace Ignition Coil (if necessary)

• If the ignition coil was suspected to be faulty, test it with a multimeter:
  • Measure the primary and secondary resistance. Refer to the manufacturer’s specifications for acceptable values.
• If outside of specifications, replace the ignition coil with a new part.
• Reinstall the ignition coil as described above.

4. Inspect Fuel Injector

• Remove the fuel rail (if required) to access the injector.
• Check the connector and wiring for signs of damage.
• Use a noid light to confirm that the injector receives a signal; replace if there is no signal.
• If testing flow, perform a flow test and ensure adequate fuel delivery; replace the injector if flow is inadequate.

5. Conduct Compression Test

• Remove all spark plugs to facilitate testing.
• Insert the compression gauge into the spark plug hole of cylinder 1.
• Crank the engine and record the compression reading; it should meet manufacturer specifications (typically around 10-14 bar).
• If compression is low, further investigation of valves or piston rings may be needed.