So I get the "check engine light" and take the car in. They tell me it's reading code ECM-431D "leak Diagnostic unit faulty signal. tested the diagnostic unit and it has power going to it, it will be necessary to replace the diagnostic pump"

Ever hear of this?

Is this necessary?

Thanks!

 

Most likely you will need a new pump and also an ECM upgrade. I have seen quite a few of these go bad. good luck