my Skoda Octavia's check engine light came on after oil change, why?

Solution

1. Preparation

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

2. Address Oil Level and Quality

• Remove the dipstick and wipe it clean.
• Reinsert the dipstick, then remove it again to check the oil level; add oil if low.
• If the wrong oil was used, drain the oil completely using the oil catch pan and replace with the correct oil type and viscosity.

3. Inspect and Replace Oil Filter

• Using the socket set, loosen and remove the oil filter.
• Check the rubber O-ring on the old filter; replace if damaged or missing.
• Install the new oil filter, hand-tightening it only (do not over-tighten).

4. Tighten Oil Drain Plug

• Locate the oil drain plug; using the torque wrench, tighten it to the manufacturer’s specified torque (usually around 25-30 Nm, but check the vehicle manual).
• Inspect for any oil leaks after tightening.

5. Clear Error Codes

• Reconnect the OBD-II scanner and clear any error codes related to the check engine light.
• Disconnect the scanner once completed.