lmm p0101??

[billybob]

If it has any mods at all, just fix the calibration first before condemning the sensor. They do fail but they aren't cheap and perfectly good sensors throw that code all the time with minor mods. Remember that the factory calibrated the sensor for stock parts and settings, and the ECM is programmed to detect abnormal operation.

How do I calibrate the sensor? I have an lmm I cant get figured out. Throws the p0101 no matter where i set c0901 or c0903.

[Boost]

How do I calibrate the sensor? I have an lmm I cant get figured out. Throws the p0101 no matter where i set c0901 or c0903.

It should not throw the code, send me your tune and I'll fix it.

tune@torquesouth.com

[chevyman2]

still having the issues with this 09 os # 12628594 that I have been chasing the p0101 and reduced power mode. Cleaned the sensor and nothing. maxed out the parameters and still have codes. so I put a new mass air flow sensor in it and still getting the reduced power and p0101. have even logged data on a drive and everything looks like its fine. like I said in the beginning the truck has been setup like this for a year without a problem any ideas?? maybe I need a quarter stick of dynamite that should fix it.!! lol
2009 OS #12628594,dpf removed, egr disabled and blocked, afe DRY filter intake system

[chevyman2]

Is there a way to properly bench test the old mass air flow sensor with a multi-meter

[GMC-2002-Dmax]

Have you looked at the wiring ? If it started doing it when it was stock intake and not with aftermarket parts then it is definitely an issue with the truck.

You changed out the MAF Sensor and a year later its doing the same thing.

Did this truck ever have a programmer on it other than EFI-Live ? Is the stock file you used an updated one or the original one ?

Try another stock LMM Tune that all segments match this stock one and do a Full Flash with a correct replacement stock file.

Good Luck

[chevyman2]

yes just put a new mass airflow sensor in and still having problem, no never had anything other than efi-live on it and it is the original file that came in the truck, last time it was at dealership was late 2010 so not sure on the updates. no I have not checked into the wiring yet dose anyone know where and which pins to check resistance on from the sensor plug to the closest harness connection?

[chevyman2]

ok got a little more info on this I was working on the truck yesterday. If I clear the code and let the truck idle for about 8 min you can hear what sounds like the turbo vanes cycling and than 2-3min later reduced power comes on with the p0101. I would clear the code and than in about 10min of idling it comes back did this five times just to be sure and to the tee the same thing every time. I was even doing some logging with the mass air flow and such and there was no fluctuation in the mass air flow. I could not get the truck to do it while driving just at an idle but the guy driving it says it comes on while driving sometimes.

[Boost]

Would you like to send me your tune as well, if I gather correctly billybob is no longer having an issue?

[chevyman2]

I can do that any thing that can help with this will be a life saver!!

[billybob]

I should have updated, that didnt solve my problem.

It needed a maf sensor