Reduced engine power, stabilitrac and traction control messages.

I've got the same problem with 09 impala. Just had transmission replaced from gm. Lights still come on. This is the tps or throttle position sensor. One is at accelerator pedal one is on the throttle body. Hoping for accelerator pedal as it is cheaper to Fox. Good luck

Not sure where my comment went? DDKPut, I had the same error messages with my 2009 Impala LT, and eventually found a blog where a man said he had replaced the APP sensor with success. It's actually in the GAS PEDAL, but you ask for an APP sensor and change out the entire gas pedal. Mine was less than $100.00, and we replaced it ourselves, with no trouble since. The man who posted this had replaced his twice. They eventually go bad- or there are faulty ones for sale out there. No matter - but the guy who posted about it probably saved my life. My car would just shut down at about 60 mph, and especially liked to do so on hills. I was in dangerous situations more than once.