my Skoda Octavia NFL (2020-Present) has a check engine light on after oil change, why?

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, and oil catch pan.
• Ensure the vehicle is parked on a level surface. Engage the parking brake.
• Disconnect the battery to prevent any electrical issues while working on the engine.

2. Retrieve and Analyze Error Codes

• Connect the OBD-II scanner to the vehicle's diagnostic port.
• Turn on the ignition without starting the engine to power the scanner.
• Retrieve any trouble codes and note their descriptions for further investigation.

3. Check Oil Level and Quality

• Remove the dipstick, wipe it clean, and reinsert it to check the oil level.
• Ensure the oil is at the proper level; if it’s too low, add the correct oil type.
• If the oil appears dirty or contaminated, consider performing an oil change.

4. Inspect Oil Filter and Filler Cap

• Locate the oil filter and ensure it is securely tightened; check for oil leaks around the filter.
• Inspect the oil filler cap for proper sealing; replace if it’s cracked or not fitting snugly.

5. Verify Oil Type and Viscosity

• Confirm that the correct oil type (e.g., synthetic, conventional) and viscosity (e.g., 0W-30) were used during the oil change.
• If incorrect oil was used, perform an oil change using the manufacturer's recommended oil.

6. Reconnect Battery and Clear Error Codes

• Reconnect the vehicle's battery terminals.
• Use the OBD-II scanner to clear any error codes stored in the system.
• Start the engine to check if the check engine light remains off.