I looked up the EWS codes...had to pull out the code reader, they do not show up as DTC code.

Code | Name | Explanation
12 | N/A | Key number 1 not valid because of wrong changing code
13 | N/A | Toleration of changing code increased with Key #1
0F | N/A | Power On Reset
50 | N/A | Key number 5 not valid because of wrong identification

I don't know which key is #1, but I thought that if the car "dinged," it recognized the key. I think key #5 is the blank key fob I have where the remote features work, but the key has never been cut.

I did try the EWS sync via the MS43 tool, but it said it failed.

I'll grab my primary ECU, bring it up in boot mode, disable EWS, and try again. I soldered on a resistor and a button switch to both of my ECUs to make entering boot mode easier...

__________________
Donald Foss
2003 E53 3.0i, 5L40e (for now)
- self-rebuilt engine, valves, SL oil pump
- ported heads, both sides
- N55 intake manifold, 70 lb injectors
- GTX 2860R-clone 60mm top-mounted turbo
- progressive slip diff
- under chassis cats
- extra sensors wired to Arduino
- 15" touch screen dash-mounted