[Tuned335i]

Here are three that I searched on and could not find explanations:

N54 Codes

2F4C
2F4C Message EWS-DME digital motor electronics electronic vehicle immobilization-digital electronics failure
Error will not cause a warning light
Error is not currently present
Test conditions have been completed
Signal or value below threshold

2F4A
2F4A Interface EWS-DME electronic vehicle immobilization / digital motor electronics
Error will not cause a warning light
Error is not currently present
Test conditions have been completed
Signal or value below threshold

Car Access System (CAS) Codes

A10A
EWS4 timing challenge / response error
Error will not cause a warning light
Error is not currently present
Test conditions have been completed
Signal or value below threshold

There are two unresolved posts about the A10A code. I've passed these on to Mr. 5 for addition to the master list. Car is running great, no issues.

[645Nm]

Unknown and weird to me also.
But glad car is running well!

[Tuned335i]

****UPDATE****

I scanned the car after driving for a bit and I get no codes whatsoever. This leads me to believe that the codes I listed above are related to disconnecting the ECU connectors accidentally before disconnecting the battery.

[645Nm]

Originally Posted by Tuned335i

****UPDATE****

I scanned the car after driving for a bit and I get no codes whatsoever. This leads me to believe that the codes I listed above are related to disconnecting the ECU connectors accidentally before disconnecting the battery.

I was hoping you would return to the post...

I got the car access code (A1OA) a day ago. Just try something...keep the door/s or window/s or sunroof open while doing the BT scan and you will get the funny access code. But not when everything is shut. Anyway interesting.

I think you might be right about the other two DME/ECU codes.

[Tuned335i]

Originally Posted by 645Nm

I got the car access code (A1OA) a day ago. Just try something...keep the door/s or window/s or sunroof open while doing the BT scan and you will get the funny access code. But not when everything is shut. Anyway interesting.

Interesting!! That's the great thing about E90Post, everybody working through these weird problems. Strange though, I always have the door open when I use the BT Tool and I didn't get the A10A code...

[mid-corner fun]

Originally Posted by 645Nm

I was hoping you would return to the post...

I got the car access code (A1OA) a day ago. Just try something...keep the door/s or window/s or sunroof open while doing the BT scan and you will get the funny access code. But not when everything is shut. Anyway interesting.

I think you might be right about the other two DME/ECU codes.

Every single time I've scanned with the BT cable is with the windows and sunroof open, cable usually going through the window or through the sunroof on laptop on top of the car. Never seen that code.

You're scanning with ignition on/engine off, right?

[645Nm]

Yes. Ignition on/engine off.
Perhaps just one of those things.