how to fix P0301 code on my 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.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery's negative terminal to ensure safety.

2. Inspect and Replace Ignition Components

• Spark Plug Replacement

  • Remove the ignition coil by unscrewing the retaining bolts and gently pulling it out.
  • Remove the spark plug using a spark plug socket and ratchet.
  • Inspect the old spark plug for wear; replace with a new spark plug of the same type and gap specifications.
  • Reinstall the ignition coil and secure with bolts.

• Ignition Coil Testing

  • If the spark plug is intact, test the ignition coil using a multimeter. Measure the primary and secondary resistance against manufacturer specifications.
  • Replace the ignition coil if it fails the test.

3. Fuel Injector Inspection

• Remove the fuel rail to access the fuel injectors.
• Inspect the injector for clogs or leaks.
• Clean or replace the injector if necessary.
• Reinstall the fuel rail and ensure all connections are secure.

4. Compression Test

• Remove the spark plug from cylinder 1.
• Insert a compression gauge into the spark plug hole.
• Crank the engine and record the compression reading.
• Compare the reading against manufacturer specifications; if low, consider further investigation into engine internals.

5. Check for Vacuum Leaks

• Inspect vacuum hoses connected to the intake manifold for cracks or disconnections.
• Use a smoke machine or carburetor cleaner around the intake area while the engine is running to identify leaks.
• Repair any identified leaks.

6. Engine Timing Verification

• Check the timing belt/chain alignment and camshaft position sensor.
• Ensure that the timing is set according to manufacturer specifications; adjust if necessary.