Start the car and let it idle, then try removing the oil fill cap in the trunk. If it is difficult to get off, you have a blown AOS and need to park the car until it is fixed. To do otherwise is to risk blowing your engine............... And, no, a blown AOS will not always trigger a CEL............
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“Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
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