I hooked up my phone to my car via DashCommand, I did a scan for codes, and there are no pending, nor any permanent, but under Stored Codes it says C02?? This trouble code is only available through the GM add-on..

I am guessing they mean the add on to allow monitoring of extra PID'*, either way I was going to pay 10$ more so I can see AFR, and a few other PID'*...

Anybody have any idea what this means though?
I have never had any CAT or O2 Sensor issues...

That is different.
I'd probably recommend getting it scanned at autozone with an automotive shop scanner and see what codes may show.
Ya it probably is an 02 sensor issue, my guess.

C is a chassis code I think. Scanner probably isn't capable of chassis/abs/etc codes. Just P codes.

Yeah, my Actron could not detect it at all.
It is not any active problem code from what I can tell, it throws no DTC'*..
I got the extra PID'* for 2006 GM, and I'll scan again tomorrow..

Mike might be on to something, I may have to get some place to do a quick scan with a TECH 2 for me..

I think it'* purchase incentive, like when you put your VIN into Carfax and it says "5 records found, pay here to see the details".

"C0XX found, pay here to see the details"

Haaaa, now that may be it, the car has never thrown any 02 codes, since I have had it the only codes came from when I had the break in the EVAP line for the MAP sensor...

After paying for the ability to scan a lot more PID'* I got this.

C0240 EBCM Malfunction
The EBCM receives a serial data message stating that the PCM has lost the ability to reduce engine torque. A requested torque signal malfunction is only one possible cause for the PCM to lose the ability to perform traction control.

I cleared it and it has not come back, of course it was an old stored code anyway...

Since the PCM lost ability to reduce torque, in essence it continuously gave you more torque ha ha..
Good work finding the older offending code information.

One of these days, I'm gonna do a print out of the codes I get to deal with on a daily basis.

Ha, I am intrigued yet very afraid Mike, lol

I think I know where the code came from, when I started the car after the LIM Gasket job, and the broken EVAP line from the MAP cause it to run like total ****, then it said something about traction control before it reduced engine power...