Hello, I'm hoping someone can help me because I think I'm getting screwed by an incompetent mechanic. I have an 04 cts and up till a few months ago, it's never stalled on me or had engine trouble. But I had a huge road trip planned and it was 13 years old so I decided to bring it in for a tune up and inspection. I bring it in to a local shop and spend a grand getting those things as well as getting a couple minor things fixed. I get the car back and about a week later it stalls on me at a red light and the only way to get it to start was to give it gas while I turned the key, also now the engine light was on. Also, now anytime I would try to start the car when it had been sitting less than a couple hours I would have to do that too (running into the gas station, stopping home to change, etc). I thought maybe it's because I'm over by a couple weeks on my oil change so I take it in to get my oil changed. Having the same problem. On my way to work it stalled at every light, 6 times. So I bring it back into the shop and told him the problem and I went back a couple days later and he charged me $450 to fix some rear mounting bolt thing that apparently was broken but couldn't figure out why my car was stalling.

Now I'm $1500 in to a shop where my car had no trouble and now it's stalling sometimes, not always. It's like once a week it stalls everytime I stop. My friend lent me some Torque thing and I plugged it into my car and got 6 error codes. Can anyone figure our what they mean? I clicked on them and I don't understand any of it. Thanks in advance

https://postimg.org/image/z6z2u143f/

For anyone who can't view the image, the error codes are as follows:

P2190 - Powertrain
System Too Rich at Idle bank2

P2188 - Powertrain
System Too Rich at Idle bank1

P2273 - Powertrain
O2 Sensor Signal Stuck Rich bank2 Sensor2

P2237 - Powertrain
2) O2 Sensor Positive Current Control Circuit/Open bank1 Sensor1

P2240 - Powertrain
2) O2 Sensor Positive Current Control Circuit/Open bank2 Sensor1

P2231 - Powertrain
1) O2 Sensor Signal Circuit Shorted to Heater Circuit bank1 Sensor1

 

Engine using too much fuel. Oxygen sensors are not working. Find a reputable repair shop to check both pre cat oxygen sensors, make sure fuses aren't blown, they are plugged in and connectors are damaged. Bank 1 sensor one is probably bad and maybe bank 2 also. Other choice check Oxygen sensor fuses and replace both pre cat O2 sensors and hope for the best. Stalling is probably related to over fueling.