Quote Originally Posted by KA98S10
well i was driving home hit 4500 and shook bad.. i hooked up my scanner and got these codes.. my CEL has been on ever since i got my engine rebuilt, but its because they dissconnected the unimportant sensors. I know the p1259 is vetc malfunction, but why would this come on? my oil level is fine and the coolant is full.. any suggestions?
al sensor are there for a reaon .IMO u need them unless you eliminate them with a tune or when u burn a chip for your car .

and i seen the p0505 i think its the IACV
could be that thats disconnected or went bad . i.ve also seen a major vaccum leak throw this code