Check Engine Light.
2000 740il. The check engine light comes on. With the scanner I have it says it is Genaric Code 171 System to lean on bank 1. I did replace both of the Ox sensors before the cats. Going to change the rears next week. After thinking about I guess I should have replace the two on bank 1 Frist. Has any one else had this same problem? What else would cause just one side to be lean? No Vacum Leaks that I can Find.
Last edited by car34; 09-11-2005 at 02:43 PM.