Red346

Ok I have had my 12 bolt in a few days and had to send my PCM to get some mail order tuning done. I got it tuned for the gear swap from 2.73s to 3.42s, rear o2s deleted, and some light tuning done for the converter. I have drove it for a few days now and the light just come on last night. I have a Scanmaster so I was able to clear the code which was causing solenoid B to stay open and the car would stay in 3rd gear. I thought the problem may have just been a mishap but it come back on tonight. My question is could the tuning be causing this problem or could it be something else.

Black Blown 02

That code is common with a 3200+stall. The pcm is just sensing too much converter slippage. You'll have to get that code turned off.