GDawgA4

I looked down at the cluster and RPMs was at zero, I didn't even feel the car stall. Only the battery light was lit.

Started back up and there was the EPC again. Now, A4Rye says he thinks he got the EPC light when his battery was going/died. Does a dying battery trigger the EPC light?

Pulled the codes again and it was the engine speed sensor but curious about the battery part. 4 years old, 3 New England Winters. I'll try cleaning the harness connector as I've found through searching (might just be dirty/loose after all the years).

EDIT: Forgot to add, restarted car after EPC light was lit, all normal, no light and idled normally (whereas EPC lit is idling at 1200). So strange.

quattrothatcould

Bad tank or gas maybe? Boost leak?

GDawgA4

Probably just a dirty engine speed sensor connector (hopefully) or dying sensor. Going to try and clean it out later today.

No loss of power, filled up a few days ago so probably would have seen bad gas then. Pulls just as strong (even better with the mid 50s temps this morning FTW)

quattrothatcould

Its been a little chilly as of late

GDawgA4

Yup. Even better for the dyno ;-)