97 E300D with a PO200, injector circuit open code?

[bellasm]

I purchased this 97 E300d about a month ago and it is driving and running great. Last evening a check engine light came on with a "engine electronics malfunction" reading. The car is still running perfect without a loss of power or rpm's. I took the car to Advance Auto and the code read PO200, "open injector circuit". If anyone could help me as to what to look for to narrow it down, that would be helpful and much appreciated. I know that both fuel filters were replaced before I purchased the car. Thanks and I look forward to some views.