I'm one of the twincharge guys and I'm not getting this DSC light on higher PSIs. I used to get this when I had an exhaust leak right by the downpipe, and it was blowing hot exhuast gases directly onto the DSC unit and it's associated lines. Once the exhaust leak was fixed, then the DSC light coming on hasn't been a problem. I do have a continuous SES light on...probably a combination of the overboost condition and the o2 readings being off.

 

I can try VGS sometime this week, I'll let you know if it makes any difference.

 

Oop you're correct! And it makes more sense haha Thanks for the correction

 

That's interesting. It makes sense... High boost results in high exhaust pressures and temperatures which can result in exhaust leaks. I like your explanation since it doesn't make sense why DSC would go off due to a MAP sensor reading.

 

I had %17 pulley and get this error, so I hit with the %15 and I still have it in the upper revs.. Especially about 215km/h in the 5th, I always get it.. I got superchips and they can't fix it.. Roads in Turkey are really bad so I need DSC in the high speeds..

 

Yes P0108. The DSC light will come on and stay on. I can't turn it off until I shut the car off and re-start. Since I installed a light weight crank pulley (0%) sometimes my SES light will come on as well as DSC. P0108 I may be hitting 19 at the gauge, but 18 for sure. -- Johan

 

Ok let me get this straight...The P0108 is associated w/ the DSC light staying on? So P0108 isn't related to the SES light?

EDIT: Or at least P0108 doesn't necessarily mean SES light?

 

wrong...P0108 is associated with the DSC and SES. It will throw 2 codes, both P0108.
right...P0108 doesn't necessarily mean SES light. For me, may be different for someone else.

 

MSFIT ....

What mods have you added since Laguna Seca ? You holdin out on me ?

 

When just the DSC light comes on, does it only store a single P0108 code?

 

17% and K&N Hot Air Intake and then an OBX Header sometime this week, just waiting for it. Then sometime in the next two weeks GIAC, then I am gonna have it dyno'd at edge.

 

yup

 

ok guys, i've had my 17% pulley for two days now, and on the fway today, I redlined in 3rd gear, and my ASC light came on, and would not turn off! I thought this only happened with DSC? Did i overboost?

 

yay!!! lol...its something like overboost..thats what i get...just restart and it clears...

you can do it on the highway turn key to off and back to position 2 and it should be fine, you wont have to crank it though, engine should still be running..

 

Mine does that. I thought it was my DSC unit getting too hot from the turbo, but I haven't been able to figure that out. So it makes sense because I get it only when I boost really hard for a period of time. :-)

 

Lol don't be happy It's not good to overboost ( Oh yes it is). MSFIT, do you have ASC or DSC?

hey dominic, is the ASC unit in the same position as the DSC unit?

 

I believe they are. The DSC unit plugs into the back of the ASC/ABS unit. The ABS unit is a square black box in the passenger side rear of the engine compartment with the metal tube lines going into it. The DSC unit is the round part connected onto the backside (outboard) of the ABS unit.

 

I have DSC

 

oh ok, i know which one now Thanks.

Is there anyone here that's thrown the ASC light (i.e. they only have ASC and not DSC?) when overboosting?

 

I know this is OLD, but, has anyone actually found a way around this issue? (p0108). I have recently been getting this code. It does appear if I hit over 17% psi (high as the gauge goes). The dealer has changed both pressure sensors on the car, and the IC boots, and still the error. I also have my DSC turn OFF when I hit a certain RPM, or speed. Sometimes I get one, then the other, or one, then the other, or just one, or both!

Dealer techs said to use "octane boost", bc the ethanol is messing up the air / fuel ratio. so, after finding ethanol free gas, and using octane boost, the light did NOT come on for some time... until near the end of the tank, then 10 mins from the dealer, BAM! SES light!

dealer techs say, i cant "do anything about it", bc its just how the computer is designed (along with its sensors).

So, since its NOT the sensors, and its NOT the boots, and its NOT the fuel I am using, WTF is it!

The last thing I can even try, / have not checked (not sure how), is that the CAT may be melted, or even just clogged. Others have expressed this as the cause. One NAM member put headers on his car and got that code to go away.

Thoughts!?

 

I delt with this on my old car with a 19% pulley. It continued to happen untill a had my cylinder head ported and polished and port matched it to my exhaust. This lowered the Boost pressures the computer was seeing. The pressure dropped due to the better flow. Never saw that overboost situation again. And saw some nice gains in HP and TQ.