why does my Volkswagen Golf MK7 (2015-2019) engine light keep coming on

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety while working on the vehicle.
• Allow the engine to cool if it has been running.

2. Address Fault Codes

• Sub-step 1: Use the OBD-II scanner to retrieve and note the trouble codes.
• Sub-step 2: Research the codes to determine the specific components that may require inspection or replacement.

3. Inspect and Replace Components

• Sub-step 1: If the code indicates an issue with the oxygen sensor:
  • Locate the oxygen sensor (typically near the exhaust manifold).
  • Use a socket wrench to remove the faulty sensor.
  • Install the new oxygen sensor and ensure it’s properly torqued (usually around 30 ft-lbs).
• Sub-step 2: If there are fuel system-related codes:
  • Inspect the fuel injectors for clogs; clean or replace if necessary.
  • Check the fuel filter and replace it if it’s clogged.

4. Clear Error Codes

• Sub-step 1: After repairs, reconnect the battery terminal.
• Sub-step 2: Use the OBD-II scanner to clear the error codes from the system.

5. Test Drive

• Sub-step 1: Drive the vehicle for a short distance to ensure the check engine light does not reappear and that the vehicle performs normally.