I just got CEL from my HFC
 

I'm trying to disconnect the battery since I got the CEL. so here is the question, should I disconnect only (+) or (-) or both??? thx thx:hello:

i only unhook the neg cable and hit the brakes one good time to alleviate any stray voltage.

it probably will gone with some learning function, i replaced whit amuse HFC light turned off after 1 week driving

Or you could get a tune and kill 2 birds with one stone.