[PO171]trouble code.
 

I couldn't find my other thread maybe I erased it by mistake.After putting in fuel injector cleaner then going for a freeway drive then home.The check engine light went out from a red trouble code to a yellow code same code number.Someone answered my thread question and said I think it may be necessary to make three from cold to operating temp runs.And or if I read it rite 40 cold starts up to operating temp.to me it sounds as if a emission control is in need of running through its test cycle And then every thing should go back to normal.I sure hope so because that code is the vehicle computer causing this I think like I said I am not sure still learning and proud to work on it myself because now its hard to know who you can trust to work on it and be honest about it.

I combined the two threads you created concerning the same problem. You can find the thread here:


https://blazerforum.com/forum/2nd-ge...B-po171-89398/


Please remember that it is against Forum rules to create more than one thread dealing with the same issue.


*THREAD CLOSED*