I have a 1997 M3/4 5speed Check engine light came on and I used my Peake code reader and codes E3 and E4 came up. Chart says Oxy adaption limit Cyl #1-3. And Oxy sensor adaption limit Cyl # 4-6. I purchased this car in 2000 with 21,000 miles it now has only 46,000 miles. any help would be great Thanks