how to clear the P0301 code on my Volkswagen Golf MK7.5 (2020-Present)

Solution

1. Preparation

• Gather tools: OBD-II scanner, socket set, torque wrench, compression tester, and spark plug socket.
• Ensure the vehicle is parked on a level surface and the engine is cool before proceeding.

2. Inspect and Replace Spark Plug

• Sub-steps:
  1. Disconnect the negative battery terminal to prevent electrical shorts.
  2. Remove the engine cover if applicable.
  3. Locate the spark plug for cylinder 1.
  4. Remove the spark plug using a spark plug socket.
  5. Inspect the spark plug for signs of wear (e.g., fouling, damage).
  6. Replace the spark plug with a new one (OEM recommended gap and type).
  7. Torque the new spark plug to manufacturer's specifications (typically around 22 lb-ft).

3. Check and Replace Ignition Coil

• Sub-steps:
  1. Swap the ignition coil from cylinder 1 with another cylinder.
  2. Reconnect the battery terminal and start the engine.
  3. Use the OBD-II scanner to check for a new P0301 code or any codes related to the swapped cylinder.
  4. If the code has moved to the cylinder where the coil was swapped, replace the ignition coil for cylinder 1.
  5. Connect the new ignition coil and ensure it is seated properly.

4. Inspect and Clean Fuel Injector

• Sub-steps:
  1. Disconnect the fuel injector connector for cylinder 1.
  2. Remove the fuel injector using the appropriate tool.
  3. Inspect for debris or blockage, clean if necessary, or replace if damaged.
  4. Reinstall the fuel injector and reconnect the connector.

5. Conduct a Compression Test (if needed)

• Sub-steps:
  1. Remove the spark plug from cylinder 1.
  2. Insert the compression tester into the spark plug hole.
  3. Crank the engine and record the compression reading.
  4. Compare with manufacturer's specifications (typically around 150 psi).
  5. If compression is low, further diagnosis may be required for internal engine issues.