So my house was burgled and they stole my spare car key. I live alone and don't know much about cars and didn't know how to disconnect the battery so I disconnected all the engine coils instead. The same night the burglars came back with my spare key and managed to reconnect one of the coils before I woke up. So they drove off on one cylinder. It didn't sound good lol. Anyway the car was found and taken to Mazda who insisted that driving on one cylinder didn't damage the car. I finally got my car back a few days ago but now istop doesn't work and the check engine light is on. I took it back to mechanic who scanned it and a pcu fault came up which he cleared. The problem was fixed for about 10mins but as I drove home istop stopped working again and the check engine light is back on. What could be the problem? Because Mazda don't seem to want to figure it out and I want to make sure insurance pays to permanently fix the problem.