[Reverend_Scott]

I have a 2006 9-3 Aero 2.8T, Auto. Recently while doing roughly 75+mph with cruise control on, after a while (could be hours or minutes) it bucks slightly as if pulled out of gear. It pops a gearbox error light with P0606, and goes into limp mode. I can clear the code and restart, and it runs great. No shift issues for hours, as long as I don't use cruise control.

I haven't noticed this on speeds under 70 with cruise. Only mod is a Vermont stage 0 93 tune over had for years. Any thoughts?

 

[aerojon]

P0606 is internal ROM error..

 

[Reverend_Scott]

I'm aware that code generally means an ecu failure. I guess I just expected more symptoms than running cruise control over 75mph+.