My son-in-law owns a Audi A4 Quatro Turbo 2003. Earlier today as he and my daughter starting for home the car lacked power and puttered. It was okay the prior day. After borrowing my car for their trip I tried the Audi and the engine sound and power were okay. The engine warning light however comes on and stays on steadily. Since my son-in-law had filled up with gas I opened the gas cap and replaced it in case that was the problem. The car still runs fine but the warning light remains on. What do you suggest is the problem? I have a similar problem with my 2003 A4 3.0 Avant. The light stayed on after starting and produced a rather loud noise from the engine compartment especially when I turned the steering wheel. Checked the gas cap, couldn't find anything wrong with the fuse panel neither.
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check engine states tighten gas cap. click 3 times but it still comes back.
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