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P code expert?? What's the trim "system"?
I can't get rid of my P1191 trim "system" error
How is this different from P1093 (I don't have this error, but have followed the same logic to resolve a "rich" condition.
My P1191 error goes on to tell me - pre cat o2 sensor too rich bank 2
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2004, X5, 3.0, 202k+
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