[dove-7]

My 2cents. I have been having the excat same problem that started officially yesterday. My had idle back n forth before had but never really cut off. I had to wait for it to restart it.

I did a diagnostic on it, first there were no codes, then there was a code 26. Then the next day there was no code, then suddenly there were codes 27, 28, and 29, but for some wierd reason no 26.

I looked my car over and over. It had to be either a shortage in the wire system or a bad sensor. I'm wagering that the Buicks have a bad wiring system because I've been having things either short on me or just plain old have a shortage, such as my radio. It one minute the volume works another it won't.

Anyways, I found the solution to my problem. It was my MAF sensor. Massive Air Flow sensor. I unplugged it my engine light came on and now the cafr starts up. You can here the car idle a little bit on the start because it is going to bypass the computer when you start it up. The computer can't detect it to tell if the sensor is a bad one or not, so it can't tirn off your car.

But the sensor must be changed for better gas mileage. I'm thinking that this may be the majority of the problems on here.