2004 Audi A4 Check Engine Light On Stays Lit Starts Fine Sluggish Step Gas

2004 AUDI A4
11,500 MILES
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check engine light on and stays lit. Starts fine not sluggish when step on gas, maybe idles a little rough but barely. just started 2 days ago. This was preceeded by an episode of large like klunk 3 days prior when car chugged and then died. Restarted car no issues till now all fluid levels ok and no leaks.
Dec 15, 2012 at 3:25 AM
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JACOBANDNICKOLAS
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If the check engine light is on, there are trouble codes stored in the computer. Take the vehicle to a nationally recognized parts store and have them scan the computer. Most will do it for free. From that, you will know why the light is on and what needs repaired.
Dec 15, 2012 at 3:29 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.