E46Fanatics - View Single Post - Low Reference Voltage on Exhaust CPS Harness
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Old 05-23-2012, 08:20 PM   #2
dmax
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Join Date: Aug 2006
Location: NJ
Posts: 23,732
My Ride: '99 328i 300K miles
Did you try just cleaning the connections with electric cleaner? The SAP valve gasket on mine was seeping oil and I think it got all over that connection.

Also, if you didn't know, our cars are finicky about only liking OE sensors/electronics. If AM sensor, that itself could be the issue.
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