how to address P0301 code on 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

• Tools Required: OBD-II scanner, socket set, torque wrench, spark plug socket, multimeter, compression tester.
• Disconnect the vehicle battery to ensure safety before performing repairs.

2. Replace Spark Plug

• 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 wear (such as cracks, carbon buildup, or improper gap).
• Replace with a new spark plug, ensuring it meets manufacturer specifications (check gap settings).
• Torque the spark plug to the manufacturer’s specified value (typically around 15-20 Nm).

3. Inspect and Replace Ignition Coil

• Disconnect the electrical connector from the ignition coil on cylinder 1.
• Remove the ignition coil using a socket set.
• Inspect for any physical damage or carbon tracking.
• Replace with a new ignition coil if necessary.
• Reconnect the electrical connector securely.

4. Check and Clean Fuel Injector

• Disconnect the fuel injector electrical connector.
• Remove the fuel injector using the appropriate tools.
• Inspect for clogs or leaks.
• Clean the injector with a specialized injector cleaner, or replace with a new one if needed.
• Reinstall the fuel injector and reconnect the electrical connector.

5. Perform Compression Test

• Remove the spark plug from cylinder 1.
• Insert the compression tester into the spark plug hole.
• Crank the engine and observe the reading on the tester.
• Compare the reading to manufacturer specifications; a significantly low reading may indicate internal engine issues.

6. Reassemble and Test

• Reinstall all components removed during the repair.
• Reconnect the battery.
• Start the engine and monitor for any check engine light or abnormal symptoms.