Started Evo this morning it was below 40°F outside. I have a P0134 and an "ECU no description available". I had this issue last year and couldn't resolve it. This only happens while the accessport is married to the car, and only when it's close to freezing temps outside. I'll try to use an enhanced reader at work later to see if I can read whatever code the accessport can't process. The car is basically stock. Just injen intake system and hard pipe on turbo hot side, replaced fuel pump relay.

 

Here let me Google that for you: https://www.evolutionm.net/forums/09...cel-p0134.html

Sounds like your o2 Sensor has taken a dump.

 

That was my first guess but it's fine. Had pulled the plug measure ohms on the unit. It's within tolerance. It's something to do with whatever the accessport is doing. As long as car is stock (unmarried), it's fine. Only when flashed do I have this issue.

 

any fix on this ? i have the same issues / codes