My wife took her cobalt to the store earlier this morning and as she was puling into the parking lot the engine died and the dash said "engine disabled" and wouldn't start. I got there, hit the key and it fired right up but the check engine light was on. I put my code scanner on it and it only showed 1 code and that was P0601. I cleared the code and drove it home with no issues what so ever. I looked up the code once i got home and according to what I've seen the P0601 means either the PCM is bad or a voltage issue and or ground issue. Can anyone give me advice on how to check the voltage and ground, more specifically what pins on the PCM these checks should be made at? For now I'm going to let the engine cool down and drive it again to see if it does it again. Any help would be appreciated.