I’ll organize your symptoms and vehicle history, then suggest possible causes, checks and relevant guides.
Share what you know; you don’t need every detail. I’ll offer an initial view, then help narrow it down.
My car is a 2018 Toyota Corolla 1.8L with about 80,000 km. It shakes at idle after a cold start and improves when warm. No warning light. The spark plugs were replaced last week; codes haven’t been read. What could cause this and what should I check first?
Do not include email addresses, number plates, full VINs or other private details. Seek professional help first for immediate safety concerns.
