Posting a supposedly stock 551P in the hopes that someone can help me work out why I have no CEL at key on. The light itself works fine with an output test using VCDS. Similar to http://nefariousmotorsports.com/forum/index.php?topic=4604.0

I have only owned the car for a few months so I don't know the history, but the car is completely stock so I can't imagine it's been tuned. However, the anti-tamper screws on the ECU cover have slots cut in them, so I gather the ECU has been out for some reason.

Anyway, does this look like a stock flash? What else could I flash with to verify CEL operation? Haven't been able to find another P-box anywhere to compare.

Cool, thanks for confirming. I was thinking about flashing an N or R, I have more research to do first on the differences between the two, and also how to restore immo functionality.

Awesome, thanks for sharing. Care to also share your sources? I would like to understand more. I've compared my bin with N in TunerPro and there are quite a few differences.

BTW, no one has done a definition for N as far as I can tell, most just use the R xdf?