how to fix P0303 code in Volvo XC60 Second Generation (2018-2024)

Learn how to diagnose and fix P0303 cylinder 3 misfire in Volvo XC60 (2018-2024). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather tools and parts necessary for the repair.
• Ensure the vehicle is parked on a level surface, and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shock.

2. Inspect and Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Locate the spark plug for cylinder 3 (refer to the engine layout).
  3. Use a spark plug socket to carefully remove the spark plug.
  4. Inspect the spark plug for carbon buildup, wear, or damage.
  5. Replace with a new spark plug (use OEM specifications, usually 0.028 inches gap).
  6. Reinstall the spark plug and torque to the manufacturer’s specification (typically around 13 lb-ft).

3. Inspect and Replace Ignition Coil

• Sub-steps:
  1. Disconnect the wiring harness from the ignition coil for cylinder 3.
  2. Remove the ignition coil by unscrewing any retaining bolts.
  3. Inspect the coil for cracks or signs of wear.
  4. Install a new ignition coil (ensure it meets OEM specifications).
  5. Reconnect the wiring harness securely.

4. Clear Codes and Test Drive

• Sub-steps:
  1. Use the OBD-II scanner to clear the P0303 code from the ECU.
  2. Reconnect the negative battery terminal.
  3. Start the engine and let it idle for a few minutes.
  4. Conduct a test drive to ensure proper engine performance and check for reoccurrence of the code.