how to fix the check engine light for code P0302 on Volkswagen Golf MK7.5 (2020-Present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to prevent electrical shorts.

2. Inspect and Replace Ignition Components

• Tools Required: Socket set, Torque wrench
• Remove the engine cover if applicable.
• Disconnect the electrical connector from the ignition coil on cylinder 2.
• Remove the ignition coil using a socket wrench.
• Inspect the spark plug; if worn or fouled, replace it. Use a spark plug gap tool to ensure proper gap.
• Install a new ignition coil if necessary, ensuring it is seated properly.
• Torque the ignition coil to manufacturer specifications.

3. Check and Replace Fuel Injector (if necessary)

• Tools Required: Noid light, Fuel pressure gauge
• Disconnect the electrical connector from the fuel injector on cylinder 2.
• Use a noid light to check if the injector is receiving the proper signal. If not, trace wiring back to the ECU.
• If the injector is faulty, remove it using a socket set and replace it with a new one.
• Reconnect the fuel injector electrical connector.

4. Recheck and Repair Vacuum Leaks

• Inspect all vacuum hoses connected to the intake manifold for cracks or loose connections.
• Replace any damaged hoses.
• Use a smoke test to identify any hidden leaks if necessary.

5. Compression Test (if misfire persists)

• Tools Required: Compression tester
• Remove the spark plug for cylinder 2.
• Insert the compression tester into the spark plug hole.
• Crank the engine and record the compression reading. Compare it to manufacturer specifications.
• If compression is low, further investigation into internal engine components may be required.

6. Reassemble and Clear Codes

• Reinstall any removed components such as the engine cover.
• Reconnect the battery.
• Use the OBD-II scanner to clear the P0302 code.