what does it mean if my Renault Clio V (2019-Present) has error 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: OBD-II scanner, spark plug socket, compression tester, multimeter, and basic hand tools.
• Disconnect the battery to ensure safety while working on electrical components.

2. Replace Spark Plug and Ignition Coil

• Remove Engine Cover: If applicable, remove any engine covers to access the ignition components.
• Remove Spark Plug:
  • Use a spark plug socket to loosen and remove the spark plug from cylinder 1.
  • Inspect the old spark plug for wear or fouling.
• Install New Spark Plug:
  • Gap the new spark plug according to manufacturer specifications.
  • Install the new spark plug hand-tight, then torque to the specified value (typically around 13-20 lb-ft).
• Replace Ignition Coil:
  • Disconnect the electrical connector from the ignition coil.
  • Remove the mounting bolts and take out the old ignition coil.
  • Install the new ignition coil and reconnect the electrical connector.

3. Clean or Replace Fuel Injector

• Remove Fuel Injector:
  • Relieve fuel pressure by removing the fuel pump fuse and running the engine until it stalls.
  • Disconnect the fuel lines and electrical connector from the fuel injector.
  • Remove the injector from the intake manifold.
• Clean or Replace Injector:
  • If cleaning, use a fuel injector cleaner and follow the manufacturer's instructions.
  • If replacing, install the new fuel injector and ensure it is seated properly.

4. Perform Compression Test

• Testing Compression:
  • Remove the spark plug from cylinder 1.
  • Insert the compression tester into the spark plug hole.
  • Crank the engine several times and record the compression reading.
  • Compare the reading to the manufacturer's specifications.

5. Inspect Vacuum Lines

• Check for Leaks:
  • Visually inspect all vacuum lines connected to the intake manifold for cracks or disconnections.
  • Use a smoke test if necessary to detect leaks.

6. Reconnect Battery and Clear Codes

• Reconnect the battery.
• Use the OBD-II scanner to clear any error codes and reset the check engine light.