No petrol, but I'm not entitled sure that it has been looked after, as the previous owner left a few pipes venting to air, which made it rub a tad lean, so yeah I think it's had an imbalance or mixture somewhere. All the code says is car not working , so I'm not sure how to cure a petrol car.. Other than replacing the whole cat, which I don't really wana do lol. I have had a thought come into my had that if it had ran lean, it's overfueled and just cooked the cat.. All sensors are good and all pipes were replaced..