how to fix the P0301 misfire code on my Volkswagen Golf MK7 (2015-2019)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal.

2. Check and Replace Spark Plug

• Tools Required: Socket set, torque wrench
• Remove the engine cover if applicable.
• Locate the spark plug for cylinder 1 (refer to the owner’s manual for location).
• Use a spark plug socket to remove the spark plug, inspecting for wear or damage.
• If necessary, replace the spark plug with a new one, ensuring it is gapped correctly (typically around 0.028 - 0.032 inches for this model).
• Torque the spark plug to the manufacturer's specifications (usually around 15 lb-ft).

3. Inspect and Replace Ignition Coil

• Tools Required: Socket set, torque wrench
• Disconnect the electrical connector from the ignition coil.
• Remove the ignition coil bolt and lift the coil out of the cylinder head.
• Inspect the coil for cracks or signs of damage.
• If defective, replace the ignition coil with a new one, ensuring it is seated properly and securing it with the bolt (torque to manufacturer specifications).

4. Check and Clean or Replace Fuel Injector

• Tools Required: Fuel injector cleaner, multimeter, or noid light
• Disconnect the fuel injector connector for cylinder 1.
• Use a noid light to check for pulse. If no pulse, check wiring and ECM.
• If the injector is faulty, remove it by unscrewing the retaining bolts and gently pulling it out.
• Clean the injector with a fuel injector cleaner or replace it with a new one.

5. Reassemble and Test

• Reconnect all electrical connectors and components removed.
• Reconnect the negative battery terminal.
• Start the engine and check for any additional error codes.