Thanks ESS4.6is. Based on the OBD II book it is Idle Control system malfunction. One of my friends had to replace the secondary air pump in his 01 X5 3.0, and the code is gone. I had both P0365 and P0505. I changed the exhaust sensors, and now I have to tune in for the P0505 code. Mine is 01 X5 3.0 67,700 miles, and it has no problems at all. I mean no problems at all except the SES light is on and it is bugging me. I asked the forum about how to DIY O2 sensors but get no response yet. I may have to look into how to do the ICV too.
ALX5