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Old 12-30-2007, 11:33 AM
Skimo100 Skimo100 is offline
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Join Date: Jul 2007
Location: Alaska
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My wife did fill the tank 3 days prior the SERVICE ENGINE SOON light came on. She hasn't driven the car much after that. Anyway I did removed the gas cap, although it was closed properly, and re-installed it. The light still remains on. Is the resetting of the SERVICE ENGINE SOON light, assuming it could be the gas cap not installed right, by any chance time sensitive or milage sensitive? Also, can the butterfly oF the exhaust valve located at the right exhaust chrome tail pipe cause this SERVICE ENGINE SOON light to come on if defective? I do hear a ratchetting noise about 1 or 2 seconds after the car turns on and the butterfly of the valve almost closes, but not completely. I do notice once the car is off that the butterfly opens completely. Is this the way its supposed to work? Is that noise normal on 2007 X3s? What exactly is the purpose of that valve on the tail pipe?
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