Random Limp Mode

Hello, I have an intermittent problem with my Seat Arona. The fault code P060C00 appears.

Main symptoms:

• The fault occurs almost always when the engine is cold (morning start) or during a Start-Stop event.

• The EPC warning light illuminates, a Lane Assist error message appears, and the car enters limp mode.

• After turning the engine off and on again, the fault disappears and may not reappear for weeks or months.

Recent maintenance (already performed):

• The battery is new.

• The spark plugs are new (recently replaced).

• Despite this, the fault persists.

Any advices?