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I have a pretty modified 2006 GTO. I've got a p2101 code along with PO1516, PO122 and PO123 Along with PO222 and PO223, and finally a PO651. So, for starters,
1. My NW102 throttlebody is bad or my ECM - E40. Still doing work flow.
2. I also need a new throttle pedal position sensor - I think about $250 for that bad boy.
3. And also I've got an open circuit (broken wire or wires somewhere in harness.)
Ok, my question for this post is:
Which one of these plug holes do I probe for TAC 1 and TAC 2 motor control?
I'm leaning toward probing 'D' and 'F'. but wanted to be sure. it just tells you to probe TAC motor control 1 and TAC motor control 2.
Any help would be greatly appreciated -Thanks!!
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Which part to test on TAC Harness Plug 
