why is my Skoda Octavia's check engine light on after oil change

Solution

1. Preparation

• Gather tools: OBD-II scanner, socket set, torque wrench, and rags for cleanup.
• Ensure the vehicle is parked on a level surface and the engine is cool.

2. Clear Error Codes

• Connect the OBD-II scanner to the vehicle's diagnostic port.
• Follow the scanner instructions to read and then clear any error codes.
• Disconnect the scanner after clearing codes.

3. Check Oil Level and Quality

• Remove the dipstick, wipe it clean, and reinsert it.
• Pull the dipstick out again and check the oil level; add oil if necessary.
• Inspect the oil for any milky appearance, which could indicate coolant contamination.

4. Inspect Oil Filter

• Locate the oil filter and check for tightness.
• If loose, tighten it according to manufacturer's specifications (usually hand-tight plus a quarter turn).
• If leaking, replace the oil filter with a new one.

5. Examine Oil Drain Plug

• Check the drain plug for leaks.
• If leaking, ensure it is tightened to the manufacturer's torque specifications (typically around 25-30 Nm).
• If damaged or stripped, replace the drain plug.