Faulty injector code?

I have a scan tool and it is showing Chart 16, 06 - which is fuel injector,cyl#1 What does the DME do to verify that the injector is working correctly? The car seems to run fine. Also is it ok to replace 1 injector or should I replace all of them as a set? Thanks Adam

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This post was auto-generated based upon a question asked on our tech article page here: Pelican Technical Article: Reading BMW Fuel Injection Fault Codes

[Wayne 962]

Good question. The DME can only perform a limited number of tests on the components in the engine to see if they are functioning properly. I believe that this code is triggered when the DME doesn't receive the correct resistance or back EMF from the connection to the injector. Sort of the same way that the car knows that a light bulb is out. This may show a problem with the wire harness rather than the injector itself. One way to test is to take the #1 injector and swap it with another known working injector to see if the fault follows the injector. If it does follow the injector, the problem is with the injector itself. If the fault stays with #1, then it's a problem with either the wire harness or the actual DME.

- Wayne