my Renault Clio V (2019-Present) has an engine light with code P0301, how can I fix it?

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.
• Allow the engine to cool before starting any work.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the ignition coil from cylinder 1.
• Remove the spark plug using the spark plug socket.
• Inspect the spark plug; if worn or fouled, replace it with a new one.
• Torque the new spark plug to the manufacturer's specifications (usually around 15-20 lb-ft).
• Reinstall the ignition coil.

3. Test Ignition Coil

• Tools Required: Multimeter.
• Disconnect the wiring harness from the ignition coil.
• Measure the resistance of the ignition coil using the multimeter; compare it with specifications in the repair manual.
• If out of spec, replace the ignition coil with a new one.

4. Compression Test

• Tools Required: Compression tester.
• Remove the spark plug from cylinder 1 and insert the compression tester.
• Crank the engine a few times and record the compression reading.
• If the reading is low, further investigation into the piston rings, valves, or head gasket may be necessary.

5. Inspect Fuel Injector

• Tools Required: Fuel injector cleaner kit, multimeter (optional).
• Check the fuel injector connector for proper voltage using a multimeter.
• If voltage is present, use a fuel injector cleaner kit to clean the injector.
• If cleaning does not resolve the issue, replace the fuel injector.