how to fix a misfire in my Renault Clio V (2019-Present) with code P0301?

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.
• Ensure the vehicle is parked on a level surface, and the engine is cool.
• Disconnect the battery to prevent electrical shorts.

2. Inspect and Replace Spark Plug

• Sub-steps:
  1. Locate the spark plug for cylinder 1 (refer to the owner's manual for exact location).
  2. Remove the ignition coil by unscrewing the retaining bolts and disconnecting the electrical connector.
  3. Remove the spark plug using a spark plug socket and ratchet.
  4. Inspect the spark plug for wear, carbon deposits, or damage. Replace if necessary.
  5. Install a new spark plug, tightening it to a torque of 15 Nm (11 lb-ft).
  6. Reattach the ignition coil and connect the electrical connector.

3. Inspect and Replace Ignition Coil

• Sub-steps:
  1. If the spark plug is in good condition, test the ignition coil's resistance with a multimeter.
  2. Remove the ignition coil from cylinder 1.
  3. Replace it with a new ignition coil if the resistance is out of specification.
  4. Reconnect the electrical connector and secure the ignition coil.

4. Check and Clean Fuel Injector

• Sub-steps:
  1. Disconnect the fuel injector connector for cylinder 1.
  2. Remove the fuel injector using a fuel injector puller or appropriate tools.
  3. Inspect the injector for clogs; clean or replace if necessary.
  4. Reinstall the fuel injector, ensuring it is correctly seated and secured.
  5. Reconnect the fuel injector connector.

5. Perform a Compression Test

• Sub-steps:
  1. Remove the spark plug from cylinder 1.
  2. Insert a compression gauge into the spark plug hole.
  3. Crank the engine several times and record the compression reading.
  4. If the reading is below the manufacturer's specification, further diagnosis is required.