Well, I kinda agree with you, but I had a car running for VERY long time with vacuum leak,so i fixed this and on top of that I cleaned MAF and replaced O2 sensor. I believe car is in need of LTFT reset. So please, tell me how, cause disconecting battery, pressing brakes, draining through starter ...

Sorry for pulling old tread back, but ....
The procedure doesn't work on my S40 T4 2001. It resets diagnostic tests, but not Fuel Trims. I'm quite in hurry cause of emmision test in next few days, so begging you to help me.
Thanks