RX300MS

It has 67K now. I went to the GoodYear and had them checked on it. They said the bank 1 sensor went bad. They did a engine clean and told me to go back; and if the light comes back again, they will have to replace the sensor. They said the sensor is 300 each. Geee. Wonder if there are any cheaper sensors for it. Thanks, guys.

Thanks, GrahamC. I think we filled it with 89. Will try to do what you said.

Guys, Need your help here. We got a 99 RX300 a month ago, and left it in the garage for about a month while we were trying to sell our other car. Last Thursday, I jumped it up and went out for some gas. On my way back home, I found that the engine check and TRAC OFF light were on. I went online and did some searches, and came back with different answers. I tried to tighten the gas cap and it did not help. During the weekend, we went for a 600 miles trip. The check engine light was on the whole time while thr TRAC OFF light went on just once. It does smell abnormal, so I think the OS2 sensor is setting the light off, but I am not sure. Can you guys give me any advise as to what to do now? Do I have to take it to the dealers or I can go to any auto parts stores for a check up? Thanks for any help.