how to fix P0301 code in Volkswagen Golf MK7 (2015-2019)

Solution

1. Preparation

• Gather tools and parts.
• Ensure the engine is cool and the vehicle is in a safe, stable position.
• Disconnect the battery to prevent electrical shock.

2. Replace Spark Plug

• Sub-steps:
  1. Remove the ignition coil cover, if applicable.
  2. Disconnect the ignition coil connector for cylinder 1.
  3. Remove the ignition coil by pulling it straight up.
  4. Use a spark plug socket and ratchet to remove the spark plug.
  5. Install a new spark plug, ensuring it is gapped correctly (0.028-0.032 inches).
  6. Reinstall the ignition coil and connector.
• Tools Required: Spark plug socket, ratchet, torque wrench (set to 22 lb-ft for the spark plug).

3. Replace Ignition Coil

• Sub-steps:
  1. Remove the ignition coil for cylinder 1 as described above.
  2. Install a new ignition coil, ensuring it seats properly.
  3. Reconnect the ignition coil connector.
• Tools Required: None additional.

4. Test Fuel Injector

• Sub-steps:
  1. Connect a fuel injector tester to the injector for cylinder 1.
  2. Activate the injector to check for proper spray pattern and flow.
  3. Replace the injector if it fails the test.
• Tools Required: Fuel injector tester.

5. Compression Test (if needed)

• Sub-steps:
  1. Remove the spark plug from cylinder 1.
  2. Insert the compression gauge into the spark plug hole.
  3. Crank the engine several times and record the pressure reading.
  4. Compare the reading to manufacturer specifications (typically 150-200 psi).
• Tools Required: Compression gauge.