[QUOTE=bcredliner;947494]Welcome!!!

10mpg is not good. You are correct the pre cat 02 sensors are part of the system to control lean/rich condition. I am not that well versed on codes but as you probably know a code may be a part of the symptom rather than identifying the cause.

Were you able to find out any history of your X? Some of the 100,000mi. Maint. have been done earlier.

Thanks for your response,
I'm only the 2nd owner of my X and its KM not miles.. over all, service history was very minimal, never any big issues, even small ones were next to none. The guy who sold it to me only did like 10k in the last two years.( his wife normally drove it) She's a1 but I just find she's bleeding the bank with the gas issue.( The truck that is, not his wife ! Maybe it's because I drive like I've driven all my 4cyl cars in the past. (A little heavy footed)lol.. regardless, I do have the po141 code but do I really need to change that o2 sensor for performance??

Don't know what to check? Maybe vacuum leak? Will have to bring it to someone I assume to get a proper diagnostic done as I'm not a mechanic per say..I can figure most general stuff, but no garage/ lift or time really. i guess I was just hoping for a magical 123 answer!