2014 chevy sonic rs code and idle issues ahhh

[Arc42]

Hi .. Need your help having code issues with P1101 and sometimes P0099 with P00f6? I have replaced many new parts and also have a higher than normal rpm by bnb like 140 more rpms than normal after warm up ..my whole text can be found under new member introductions please help thank you 12-1-2019.. tj

 

[Maddmatts]

What have you replaced so far?

My best guess is one of the two air intake temp sensors is bad, skewing the MAF sensor's self-test. They're bundled with the MAP sensors and one is easy to get to on the intake manifold. The other is attached to a plastic elbow waaaay down by the intercooler discharge.

 

[Arc42]

I changed map and maf and intake air temp / pressure sensor in charge pipe before throttle body and changed throttle body and evap purge valve and valve cover and my problem began before all of these new parts

 

[Arc42]

Also I can cycle key to on position on and off twice then third time leave in on position until all lights and sounds stop then step on accelerator pedal down 5 times and release quickly then start car and guess what it idles normally around 690 to 705 rpms... but even then I go for a drive and get pending code P1101 ... and as soon as I shut off car and restart it immediately it goes right back to 840 rpms??? Dont know why??

 

[Maddmatts]

The change in RPM might be some kind of safe guard triggered by the code. If it were a symptom of a physical problem like a vacuum leak, it would be high all the time.

The problem might be between the MAF sensor and the ECM. Check the ECM's connectors for corrosion or bad pins. Check for continuity between the pins of the MAF connector and the ECM connector.

I'm not sure what else it could be after this.

 

[skurtov]

PCV issues. Bet.