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Originally Posted by Bobdubich
Any luck on the part number?
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Sorry to dig up an old thread, but I've been working through this exact issue myself.
Looks like the part number is 12637591534, and it's typically referred to as an "Integrated Supply Module".
I replaced mine which cleared the issue for about a day, but then the codes came back, so I think I have a loose wire somewhere between the DME and O2 sensors...