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 necessary tools and parts.
• Disconnect the battery to ensure safety while working on electrical components.

2. Inspect and Replace Spark Plug

• Sub-steps:
  • Remove the engine cover if applicable.
  • Use a spark plug socket to remove the spark plug from cylinder 1.
  • Inspect the spark plug for signs of fouling, wear, or damage.
  • If damaged, install a new spark plug with the correct gap (typically 0.8 mm for Clio).
  • Torque the spark plug to the manufacturer-recommended specification (usually around 25 Nm).

3. Check and Replace Ignition Coil

• Sub-steps:
  • Locate and remove the ignition coil for cylinder 1.
  • Inspect the coil for cracks or signs of wear.
  • If faulty, install a new ignition coil ensuring it is securely seated.
  • Reconnect the electrical connector.

4. Inspect and Clean Fuel Injector

• Sub-steps:
  • Remove the fuel rail to access the fuel injector for cylinder 1.
  • Inspect the injector for clogs or deposits.
  • Clean the injector using a specialized fuel injector cleaner or replace it if necessary.
  • Reinstall the fuel rail ensuring proper sealing.

5. Perform Compression Test

• Sub-steps:
  • Remove the spark plug from cylinder 1.
  • Insert a compression gauge into the spark plug hole.
  • Crank the engine several times to take a reading.
  • Compare the results to the manufacturer’s specifications (usually around 12-14 bar).
  • If compression is low, further diagnosis of the cylinder head or piston rings may be required.