UrbanCruiser check engine light power loss

I also own a Toyota UrbanCruiser and had similar symptoms. Does the smoke smell acrid? My PCV valve was the culprit. Inspect the valve and hoses for damage or blockages. Any unusual engine noises?

The smoke smells slightly acrid. I'm not familiar with the PCV valve's location or how to inspect it. What should I look for when examining the valve and hoses?

Since it smells acrid, it's likely the PCV valve. Given you don't know its location, don't attempt a repair yourself. Take it to a trusted mechanic to diagnose and replace the valve. A damaged crankcase ventilation can increase pressure and force oil past seals, so fix it immediately.

I'll schedule a mechanic to inspect and replace the PCV valve. The repair cost 360€. Thanks for the insights!