Technical Help! ESC, Hill Start, Transmission, Check Engine Lights

[owner of chip fiat]

Help! My 2015 500L (116K miles) Pop's ESC, Hill Start, Transmission, Check Engine Lights came on, coughed then almost died, and came to a stop. I had it towed to a mechanic, he ran the codes, and it came back with a Throttle Body error. He replaced the Throttle Body, I picked up my car ($900 later), and it did the same thing, lights and all, not even a stop sign away from the shop. He then looked at it for a whole week and said he cannot pin point what is wrong- only that he thinks it might be the computer, since the only code he is still getting is for the Throttle Body still. Is this a fuse or senor issue? Computer? Something else?
Does anyone out there have any suggestions?

 

[bugsymike]

Several people have had similar with multiple issues, some have come down to earthing points to the ECU etc.the wrong battery (not a stop start type) not following the battery recommended installation for stop / start etc. Low battery voltage often throws up errors as the ECU uses small variations to run things.
Several threads on Forum regarding this may be worth looking into.
What I would say is use either MES diagnostics which many members here recommend for Fiats and can give good advice related.
This is a Windows based program, but must have the correct leads for your vehicle.
Personally I can sometimes access my friends Snap On Zeus system which has worked for me as I don't use Windows OS.