2002 BMW M5 check engine light on codes 227 and 228

mike.salcido · Posted at Tue Oct 28, 2008 10:16 am

Engine Performance problem
2002 BMW M5 6 cyl Two Wheel Drive Automatic 133000 miles

i have the codes 228 and 227 O2 sensor bank 1 and 2 deviation need help check all data and no codes on there about those code. where should i start looking?

Dr. Hagerty · Posted at Tue Oct 28, 2008 4:49 pm

Mike, can you send the last 7 characters of the vehicle identification number so I know exactly what car we are talking about? Also, what method of code extraction was used?