StreetDreamz

I know what they mean. I know what they do. But I have no god damn clue how to fix it. Has anyone else ever run into these codes simultaneously? Thanks guys.

R33P3R007

Damit... i got them both right now. Bump cause i don't even know what they are. I got them with 2 others too.

zinner

P1183 is the inlet pressure sensor code. I would look into that. The 0068 is a correlation CEL probably triggered by the supercharger inlet pressure sensor error.

Blown 4-banger

P1183 is the supercharger inlet pressure sensor, and P0068 is throttle body performance.
You could have found out by simply looking at the DTC list
https://www.cobaltss.net/forums/problems-service-maintenance-69/cobalt-dtc-thread-merged-12015/

cav101

Conditions for p1183

The TP indicated angle parameter is more than 0 percent, when the engine speed is less than 1100 RPM
or
The TP indicated angle parameter is more than 10%, when the engine speed is more than 1100 rpm.
(The PCM detects that the SCIP sensor signal voltage is less than .02 volts for more than 2 seconds)


P0068
The ECM detects that the calculated airflow rate is more than expected

The above condition is present for more than .02 seconds.
(Inspect throttle blade for damage)
(A skewed cam sensor signal - inspect for signals that are intermittently shorted to ground)

R33P3R007

well...thanks. alreadysaw it, and still don't know how to fix it

sensesfail99

ive only had 2 codes go off on my car.... i dont remember what they were, but i remember i took the car in and had them run some kind of update... like a pcm or something and that fixed it....

chevytech

if you want i can print up the exact flow charts at work tommorow? i dont know if it pertains to these codes. but there was an issue with the throttle body electrical connector not being seated properly. try removing the tb connector without the key in the igniton. and clearing the codes if that does not work i can get exact printouts of the flow charts tommorow.

cav101

Try checking for air and vaccum leaks.

zinner

I have read several threads with IRL's with faulty SCIP sensors....

I know it's not the scientific method of diagnosing the problem but it's a guess. If the sensor isn't that much might be worth getting a new one. If you have a scan tool or something just check out the readings your getting from it.

Julex

I had both these codes, my I set MAF fail HZ higher and it fixed the proplem. I'm betting your MAF sensor is failing and that causes the TB to see more % then it really is at. Sounds funny but I fixed it by upping it. Try 13000hz if you have access to HPTuners.

Also if anyone has any info of a higher BAR Maf PST, these Maf sensors suck, sense they almost max with a stock pulley nevermind a 2.7 they max out by 3k rpms. I'm running SD anyway without the Maf sense it's less I have to diagnose when I have a problem.

2K5SS/SC?

Julex talk to Bad06SS, I think he's running an LT1 or LS1 Maf somehow.

Cobalt_Supercharged

The LT1. I believe Casper's makes a plug adapter for it. It will require adjustments to the MAF table to run properly.

Bad06SS

iTrader: (1)

Yes, I'm running an LT1 maff. You don't have to make a big adjustment for the maff, but you will want an adjustment to be accurate. The LT1 can flow more air, and is alot less sensitive making it much easier to tune! The stock maf is too sensitive, and can be maxed out fairly easily.

Cobalt_Supercharged

Did you need any electrical adapters for this or did it plug right in?

Julex

Should be plug and play I would think, as long as the Maf has the intake air temp probe. I'll look into the LT1. Yea on my own car I haven't even bothered tuning the MAF just running SD, so much easier right now, but I'll need the MAF when I upgrade to 60's later on. And I'm pretty familiar with tuning a MAF just don't have a wideband on my car, only those I've tuned. I used Fuel trims which got it close but again I stopped bothering since I just run SD. Thanks

Bad06SS

iTrader: (1)

For the most part. If I remember correctly, there might be some small "cut and splice", but nothing major at all. You just need the LT1 maf, an IAT sensor, and a LT1 connector (pigtail).

Mase

I don't see how you guys say the maf max's out. Here's my readings and I hit 42lb/min.

Witt

If you haven't yet got your problem fixed, the SCIP code 118X whatever one it was, is a SCIP reading outta range obviosuly. The P0068 code shouldn't be triggered along with this unless one of your three other sensors is far enough out of range of the calculated value, the pcm doesn't show it as faulty, but its simply not calibrated. My guess as a cause would be adding a larger diameter intake pipe without recalibrating the MAF, and then having your SCIP sensor go bad.

kingg5

iTrader: (1)

what are u guys using to find out that sort of stuff??

Cobalt_Supercharged

HP Tuners VCM Suite

yellowsc

I got the same code 0068 and 1182 on mine last weekend at a track event.
I have stage 2 and have been running it unchanged for the last year.
Why did it trigger the code now and not earlier ?
I had it on the dyno and a guy tuned it with HP but I do not remember what the MAS Hz was or is.
Is 13000 high enough for a 2.5 pulley ? (I was going to switch next month)
What do you change when you add the LT1 MAS ?

Ljavy17

He had said he knows what they mean, To fix it, just check the plugs in ur supercharger, make sure they are all tight.

Julex

To know if you are maxing the MAF, scan with HPTuners and logging MAF HZ. MAF sensor only reads to 10000hz, which with a 2.7 is achieved at 4k rpms after this the pcm must guess the incoming air by using I believe "Engine RPM vs MAP" which is basically the same calculations as being in Speed Density. If you set MAF HZ fail safe to 12500hz+ you won't throw the MAF performance or high frequency codes.

chubbyditty

If you haven't found out the problem I just fixed mine. Is your car staying at high rev when u take it out of gear? The sensor on top of your supercharged is the wrong plugin. Switch it with you map sensor located just behind the supercharger. Hope this helps everyone else