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Hi, brand new here. I have a 2017 1.4L gas turbo Cruze LT with 90,000 miles. The seemingly common P1101 code popped up and no other codes. It went away once but came back for good. I have read every related post on here and have a few questions. First I have changed the Air filter, cleaned the MAF sensor and cleaned the throttle body. Code is still there. I also checked the intake tubes for tightness and checked for vacuum leaks. Everything good there. Also gas mileage has taken a good sized hit.

Now I did find oil in the large diameter air tube by the lower radiator support that leads to the turbo. Is this a symptom of a PCV valve?

How do you remove the tubes from the pcv valves? Looks like quick disconnects but I couldn’t remove them with risking breaking them. I saw another post about using picks but no details and nothing on YouTube - everything comes up as the gen 1 replacement. Do you replace all 3 or is there one that is most likely? Anyone know what thread and diameter bolts the tamper resistant pcv valve bolts are? I just want to replace them with easy to remove bolts? Will need to use vice grips to remove them.

I did see another post about the pcv orifice being clogged and that it’s under the valve cover. Anyone know the part number of that and where it’s located within the cover? Not sure that this would have caused the oil in the air intake tube though. Also I do use good synthetic oil and mostly highway driving, very rarely idling.

Finally, does anyone know what the small black plastic box is that the pcv tube is connected to, that sits on the upper air intake tube? I see a crack in it. See photos. Could be some unmetered air getting in causing a code, but with ether start, it did not appear to be sucking in outside air.

I will only change the MAF sensor if all else fails. It doesn’t seem to be the issue with the symptoms I have and cleaning already performed.
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Discussion Starter · #2 ·
Well I spoke to soon. I didn’t erase the code but after cleaning the throttle body and a long drive the service engine soon light went off on its own and never came back.

That still leaves me with oil in the intake tube leading to the turbo by the lower radiator support. Can anyone confirm that this is most likely the pcv valves going bad?

How do you get the pcv valve tube connectors off the pcv valve? Rock auto sells the pcv valves separately, you don’t need to buy the whole assembly.
 

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I have the same problem on my 2018 chevy cruze ls 1.4 turbo the p1101 came up I changed the air filter the maf sensor and it went off passed inspection 5 minutes right after it went off I leave the garage and it came back on and only was at the garage 20 minutes and hasn't went off since and when idling it sound like loosing power and will shut off and when the p1101 popped up it said manufacturers control and it is terrible on gas if there is any pointers you can send my way on what it possibly could be would be very much appreciated because I originally bought it for my wife but she won't drive it because she is afraid she is gonna get stranded somewhere and gets nervous from the rough idle like I can be sitting at the stop light waiting for it to turn green and the car idles high and trys to jerk forward like your in a twin turbo drag car bumping In on the line to build boost then idles low I use the best synthetic oil I can buy and still am puzzled and just wanna have the car running right so my wife can enjoy it and and go places with the kids and not have to be nervous thinking gonna break down in the middle of nowhere with the kids hopefully you have yours fixed and running 100%
 

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2017 Chevy Cruze Premier Hatchback
HMMMM i seem to have the exact same problem as both of you folks and dread pulling the camshaft cover and read every thread for the last two days and no one has anything on pulling this cover. There is a bulletin from GM Bulletin No.: 20-NA-047. Has anyone found a solution? I cleaned Throttle body checked all hoses etc... And there are no vacuum leaks and i only get a P1101 code once in a while and it will go away for a week or two then come back. Car seems to idle ok too

Car has 62,000 miles and I found a little oil Stain on the Lower hose to the cooler from the turbo and cleaned it up, It didn’t amount to a quarter of a tea spoon form all the holes pulled from the air box to the turbo to the cooler and no oil in the cooler to the throttle body; there didn’t seam to have any oil in the cooler and the car does not consume oil, I use good synthetic oil every 6 to 7000 miles

I have a scanner with me hooked up monitoring it for the last two weeks. Also what is odd is all my ready sensors are OK except the evap. for the gas tank, but never throws a code, HMMMMM My Vacuum at start up at the dipstick with a water Manometer is at 0 then after it heats up at idle it is -.5 Inches of water column. HMMM would like to see it at -3 to 5 IWC but i don't know if this 1.4L turbo is even capably of that even thou the bulletin says it is.

The tamper proof bolts on the two PCV are bullshit by GM and i can't believe what i have to do to change these on top of the tapper proof lines to them UGHHHH. I may have to pull the Camshaft Cover to check the PCV orifice and clean it and buy all the gaskets and PCV's and lines if i am going to pull the cover i will replace everything. Anyone have any suggestion.
Thank You In advance
 
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