Need some help problems with my 2.5 altima

[kbm_612]

I took it to the shop the other day for some work i get home my check engine light comes on so i take it over the following day and they ran a computer check it says pcv valve needed to be replaced replaced it engine light is still on and when sitting in park it revs by its self and it drops and revs an so on and they cant find the problem. Any advice on what to look for?

[CPS]

Sounds like the throttle body is bad to me. The IACV (Idle Air Control Valve) controls the issue you are describing. You could try to have the throttle body relearned (because the IACV is integrated into the throttle body), but it's probably going to need a new throttle body.

[kbm_612]

All thoughs things check out they said they think the ecm is bad. Any idea how much it will cost to fix or replace if it is the ecm?
Modified by kbm_612 at 10:35 AM 4/21/2009