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I had a 1999 540I for about 3 years, never have a problem until the other day when my on board computer engine light came on and an I have a reading of SPFI program or something like that, I can no see it very well because some letters comes and others don't it it like its blurred, but anyway can somebody tell what is wrong with SPFI program on this car. I changed one of the coils because it was faulty