Just scanned. No codes.

 

You need a scan tool that reads B/C/U. Or take it to your local auto parts store for a FREE scan.

 

I'll do that tomorrow .

 

With a 13yr old, save money/diy/get a quality scanner like this>>> Foxwell NT510 Elite for GM All System OBD2 Scanner Car Diagnostic Tool ABS Oil

 

I don't know if this has been suggested (I didn't want to read 7 pages to find out), but have you checked to see what the TPMS is set to? I have heard (on the H3) if the TPMS is calibrated to any other tire (ply/load rating), the TPMS will not function properly. If someone in the past figured they would adjust to the "correct and current" tire, then it could result in the symptoms you are experiencing. I totally recommend this Autel scantool: https://amzn.to/3hWofgF . It does a tonnn and is super helpful. It allows for "adjustment" of the TPMS, which includes changing tire info (which could possibly be what resulted in this issue).

 

TPMS are new and went into 4 new tires. Thanks for the links to the code readers. I'll get a free scan at auto store today. Money is getting real tight now as I've spent a lot on this H3. Need to keep some money for wine, woman and song.

 

Scanned at auto store. 2 codes. P0054 and P0138 HO2 sensors. Came home and scanned with my cheap one. Only P0054 on it. What's going on ? Don't think these have anything to do with TPMS. Someone tell me where these are located on my alpha. Yea i know in exhaust but where? I don't want to go under it today. Just a location please.

 

So the TPMS transmitters have a built in GPS? Impressive!

Sorry, but I'm doubtful. Plenty of comments on that youtube video where it didn't work, although there are some that claim it does. I guess one way to prove it would be to relearn your TPMS system to 3 "on the ground" tires + the spare. If only movement is needed and not rotation, then the TPMS warning will stay off while driving. But if rotation is needed (which I suspect), then the TPMS warning will trigger while driving since the spare would not be rotating/transmitting.

 

TPMS sensors are controlled by the bcm! Same with any on/off switch. BCM activates the TPMS sensors when the vehicle is moving. Parked running in the driveway with low pressure tires, will not set the warning light, when driving on low air pressure tires, within a few miles the warning light will come on. TPMS sensors transmit pressure, not rotation.