Why it matters: Dashboard warning lights: red, yellow and green

Reacting incorrectly works in both directions. At a garage in Venray, learners sometimes ignore a yellow light for weeks because 'it didn't need to be immediate' — but the problem stays, and 'not immediately' is not 'never'. Conversely, on an evening drive towards Oss, some keep driving with a red light on because 'it's just a light' — while red specifically risks engine damage and endangers safety. The colour is the instruction, not the mood.