I had bank 1 and 2. Code was 491-492. Since the repairs have been made. The Check engine light do come on. Meaning during start up it do not appear with he rest of the indicator at your dash board.
RepairPal Certified shops can diagnose and repair your 2001 BMW 740i. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.