why does my Renault Clio V (2019-Present) engine misfire with P0302 code

Learn how to diagnose and fix P0302 cylinder 2 misfire in Renault Clio V. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather necessary tools and parts for the repair.
• Disconnect the battery to prevent electrical shorts during repairs.
• Allow the engine to cool before beginning work.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket, dielectric grease.
• Remove the engine cover if applicable.
• Disconnect the electrical connector from the ignition coil for cylinder 2.
• Remove the ignition coil and then the spark plug using a spark plug socket.
• Inspect the old spark plug and ensure it is not fouled or damaged; replace if necessary.
• Install the new spark plug, ensuring it is torqued to the manufacturer's specification (usually around 20 Nm).
• Apply a small amount of dielectric grease to the inside of the ignition coil boot.
• Reinstall the ignition coil and reconnect the electrical connector.

3. Replace Ignition Coil

• Tools Required: Socket set, torque wrench.
• If the spark plug replacement does not resolve the issue, proceed to replace the ignition coil.
• Disconnect the battery before handling the ignition coil.
• Remove the ignition coil for cylinder 2 following the steps in the previous section.
• Install the new ignition coil and torque it to the manufacturer's specifications.
• Reconnect the battery and ensure all connections are secure.

4. Clean or Replace Fuel Injector

• Tools Required: Fuel injector removal tool or socket set, fuel line disconnect tool.
• Relieve fuel pressure in the fuel system before removal.
• Disconnect the fuel injector electrical connector and fuel line.
• Remove the fuel injector from cylinder 2.
• Inspect for clogs; clean the injector using an appropriate injector cleaner or replace it if damaged.
• Reinstall the fuel injector and reconnect all lines and connectors.

5. Conduct Compression Test

• Tools Required: Compression gauge.
• Remove the spark plug from cylinder 2.
• Insert the compression gauge into the spark plug hole.
• Crank the engine and observe the compression reading.
• If the compression is low, further investigation into piston rings or valves may be necessary.