cel came back on

[jd1828]

i had a cel on my car for a while now. it was a p505 which is something to do with the idle control. i assume that it was a bad isc so i picked up a used one. i was told the used isc was still good. i put it on a few days ago and cleared the light. almost two days later it came back. i checked the code and its the same p505 code. is there something else that i should fix. the idle use to bounce around from 1k to 3k really fast and would die all the time. i havent had that problem since changing it but the light did come back.

[LightningGSX]

p505? Are you sure it wasn't a p0505 or a p1505? OBDII format should be 5 digits total, one letter and four numbers and the first number can only be a "0" or a "1"(or "2" or "3" but not on a pre-2002 vehicle)

[jd1828]

i used the scaner at checker and it came up as p505, it may have just dropped the 0 form the beginning. thats what i thought or i could have read it wrong. i would check again but i cleared it so it might be a few days untill it comes back.

[LightningGSX]

What year car is this?

[jd1828]

its a 96 tsi awd

[jd1828]

alright its back. it is a p0505. so where should i go from here?

[Pimpin Dsmstyle]

just block off all that shit. Maybe im thinking that will cure the problem, however i could be wrong. Ask some of these more experienced guys and if they say the same, hit up QPR.. they have plates for this.

[Sean485]

You could block off the faiv and the isc but it would idle like $hit if at all...

I would ohm the isc and see what it reads, I am not an expert on 2g's and my dsm cd manual up and walked off so I cant offer much other help, sorry.

[unreal808]

Remove the light from the cluster.

[A//// Guy]

[QUOTE=Sean485]You could block off the faiv and the isc but it would idle like $hit if at all...

Actually it will idle just fine. Startup wont run "fast idle" though becuase there is nothing to speed the idle up until its warm. But if those sensors are missing I think it will pop a cel anyway on a 2G.