Hi, a few months back I bought a 2005 Hyundai Tiburon. I bought it double checking it and no "Check Engine" symbols were on. But, when I started to use it for the first month or so on the highway I got a check engine light. So I decided to plug my computer on it and I got the error code: PS0133, Oxygen Bank 1 Sensor 1. So, I looked it up and it seemed that the Exhaust Manifold was faulty. I went to a Hyundai Dealer bought the part and installed it myself. But, I still get the same error code. Does anyone know how to fix this???