P0641 code/p0050/p0154/p0155

[Bowtied]

So I recently deleted and welded my cats due to numerous problems with replacing sensors and cost of new oem cats above my budget,
and I’m not sure if this is unrelated but while driving the last two days I’ve been repeatedly put into limp mode (stabilitrak off/engine power reduced) continuously for the last two days with codes:
p0050
p0154
p0155
and p0641.
Starting the Tahoe, there are no issues until I give the truck throttle and then I am sent into limp mode. If I delete the codes I can drive normal speed again, albeit quite rough.
I replaced the Map sensor hoping that was the culprit and it was not.
Any clues as to what might be going on?

 

[swathdiver]

So I recently deleted and welded my cats due to numerous problems with replacing sensors and cost of new oem cats above my budget,
and I’m not sure if this is unrelated but while driving the last two days I’ve been repeatedly put into limp mode (stabilitrak off/engine power reduced) continuously for the last two days with codes:
p0050
p0154
p0155
and p0641.
Starting the Tahoe, there are no issues until I give the truck throttle and then I am sent into limp mode. If I delete the codes I can drive normal speed again, albeit quite rough.
I replaced the Map sensor hoping that was the culprit and it was not.
Any clues as to what might be going on?

My vote is wiring problem, like a critter having a spaghetti dinner on your dime or the ECM is kaput.