Hello, I'm Chris. Thanks for seeking us for help.
0174 is a lean code for bank 2, the drivers side of the engine
. A vacuum leak, fuel injector
not spraying, or misfire can cause this code.
0197 is for the engine oil temp sensor not reading correct, usually a faulty sensor but possibly wire damage being you just worked on the vehicle in many areas.
0206 and 0207 are injector issues for cylinders 6 and 7. Possibly unplugged or they have wire damage.
Have you checked any of these things?
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