how to fix P0302 code in Volkswagen Golf MK7 (2015-2019)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool before starting work.

2. Inspect and Replace Ignition Components

• Tools Required: Socket set, torque wrench, spark plug socket, dielectric grease
• Remove the engine cover if applicable.
• Disconnect the ignition coil connector for cylinder 2.
• Remove the ignition coil by unscrewing the retaining bolts and gently pulling it out.
• Inspect the spark plug for wear or damage; if worn, replace it with a new OEM spark plug.
• Apply dielectric grease to the new spark plug and install it into the cylinder head, torqueing to 20 Nm (15 lb-ft).
• Reinstall the ignition coil, securing it with bolts and reconnecting the electrical connector.

3. Inspect and Clean Fuel Injector

• Tools Required: Injector cleaning kit, safety glasses
• Remove the fuel rail according to manufacturer specifications.
• Carefully extract the fuel injector from cylinder 2.
• Clean the injector using a fuel injector cleaning kit to remove any deposits.
• Reinstall the cleaned or new injector, ensuring it is seated correctly, and reattach the fuel rail.

4. Conduct Compression Test (if necessary)

• Tools Required: Compression tester
• Remove the spark plug from cylinder 2.
• Insert the compression tester into the spark plug hole.
• Crank the engine for several seconds and note the pressure reading.
• Compare the reading to manufacturer specifications (typically around 180 psi). A significantly low reading indicates internal engine issues.

5. Reassemble and Reconnect

• Reattach any components that were removed during the inspection.
• Reconnect the negative battery terminal.
• Start the engine and let it idle to check for any unusual noises or issues.