how to fix P0301 misfire code on Volkswagen Golf Seventh Generation (2013-2020)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to prevent electrical shock.
• Allow the engine to cool before working on ignition components.

2. Inspect and Replace Spark Plug

• Tools Required: Spark plug socket, torque wrench, ratchet, gap gauge.
• Remove the ignition coil from cylinder 1 by unbolting it and disconnecting the electrical connector.
• Remove the spark plug using the spark plug socket.
• Inspect the spark plug for wear, carbon buildup, or damage.
• If necessary, replace the spark plug with a new one, ensuring the gap is set to manufacturer's specifications (typically around 0.028-0.032 inches).
• Reinstall the spark plug and torque to the manufacturer’s specification (usually around 25 Nm or 18.4 lb-ft).

3. Check and Replace Ignition Coil

• Tools Required: Ratchet, socket set.
• Inspect the ignition coil for cracks or signs of arcing.
• If the coil shows signs of failure, remove it by unbolting and disconnecting the electrical connector.
• Install the new ignition coil by reversing the removal process, ensuring it is securely fastened.

4. Fuel Injector Inspection and Cleaning/Replacement

• Tools Required: Injector cleaning kit or replacement injectors, fuel line removal tool.
• Disconnect the fuel rail and remove the injector for cylinder 1.
• Inspect the injector for clogs or damage.
• Clean the injector using a cleaning kit or replace it with a new injector if necessary.
• Reinstall the fuel injector and ensure all connections are secure.

5. Verify Engine Compression

• Tools Required: Compression tester.
• Connect the compression tester to cylinder 1.
• Crank the engine and record the compression reading.
• Compare the reading to the manufacturer’s specifications (usually around 120-200 psi). If compression is low, further investigation into engine internals may be necessary.