why is my Toyota Corolla E140 (2006-2013) check engine light on after oil change?

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, oil filter wrench, and safety gloves.
• Ensure the vehicle is parked on a level surface and the engine is off.
• Disconnect the battery negative terminal for safety.

2. Inspect and Reset Check Engine Light

• Step 1: Reconnect the battery negative terminal after completing the inspection.
• Step 2: Use the OBD-II scanner to clear the error codes. Follow the scanner instructions to reset the check engine light.
• Step 3: Start the engine and monitor for any persistent codes.

3. Oil Filter and Oil Level Check

• Step 1: If the oil filter is loose, tighten it to the manufacturer's specified torque (usually around 18-25 ft-lbs).
• Step 2: If the oil level is low, add the recommended oil type (5W-20 for most models) until it reaches the full mark on the dipstick.
• Step 3: If the oil filter is damaged or incorrectly installed, replace it with an OEM or quality aftermarket part.