Hello.
I bought my 1996 Tahoe in March. My family and I lover her very much, her name is Baby Blue. So, my check engine light came on. This is my first ever OBD2 vehicle, so I bought a scanner to see what the problem could be, and I cleared the code to see if it would reappear, or not. It did. Both times, I got 1 code, P0175 System Too Rich (Bank 2). She runs real good so I don't know. Has anyone experienced this condition before who can say how they were able to fix it? Or any ideas at all, I was thinking injector(s) or oxygen sensor(s)? But, I don't want to just start throwing parts at it. Thank you for any ideas.

 

How many miles? Has it been tuned up? Did you use original plugs or crap plugs? Plug wires been ohm'ed?

Outside of a good tune its possible you have an injector leaking down after you shut off the motor. Does the engine fire right up on the first crank? Extended crank time or maybe two cycles of the key?

More details please