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Old 11-28-2003, 11:35 PM
Benzmac Benzmac is offline
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Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
It comes on at times when warm to test the secondary air system. This is normal. When on, the front Oxygen sensor has to drop to or below 40mv in 60 seconds.
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Benzmac:
Donnie Drummonds
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MERCEDES SPECIALIST 11 YRS
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