Had my 05
MCSa in the shop this morning for some unrelated work. At check out, the SA told me that an update for the service engine soon / oxygen sensor problem had been applied. The SA said this update had been released just yesterday, 30 June 2005.
I myself have not the SES light come on and have not had any problems with the o2 sensor so far. So for me, I guess it was a preventative software update.
Below are some of the details from my work order:
SIM #12-03-05 LBL CODE 19 DME PRGM ON R5
-paul