Hey, I've gone 6,000 miles now with a stuck orange check valve in the intake manifold, and my Cruze is still running fine with no codes.
I think the 1101 code is from something else other than the check valve. Just to be clear, did you do all the work yourself, and only took it to the dealer for a diagnoses?
... Valve cover fixed the 171 code and we finally took it to dealer after cleaning map, maf, and throttle body and replacing air filter. They came back and said it was the PCV tube from intake to turbo. So we ordered it and got it installed and it fixed the code but, now rpm fluctuates from 500 to 900 at idle and while stopped in gear and neutral also...
The way this reads, it sounds like you could be saying the dealer replaced the PCV tube. If that's the case, then obviously you wouldn't have driven out of the dealership without it being fixed at that moment, and this would mean at some point later the idle started fluctuating. There are reports of the valve cover failing again in as little as 7,000 miles afterwards because of the stuck check valve (which would explain the rough idle), but most go longer than that until failure again.
I've sprayed around with carb cleaner and can't find any vaccum leaks. We put old PCV tube back on and fixed idle issue but now we're back to throwing 1101 code. Thanks for any help!
As for this, I don't know. :icon_scratch: