got a code today, charge pressure negative deviation, what the hell is that?

1SeriousPig · 09-05-2005, 01:06 PM

***O.W. Kenobi*** · 09-05-2005, 01:10 PM

You'd be surprised what you might find in the archives. Chances are, someone has had the same code and posted about it before.

-SlowSilverTIPJason- · 09-05-2005, 01:13 PM

burningcoals · 09-05-2005, 01:22 PM

TwinTurboTerror · 09-05-2005, 01:40 PM

PSmalls::DoggieStyle · 09-05-2005, 01:42 PM

-SlowSilverTIPJason- · 09-05-2005, 01:51 PM

PSmalls::DoggieStyle · 09-05-2005, 01:55 PM

Therefore, they get the code but it has absolutely no negative effect. If the N75 were in the loop, you'd go into limp mode.

If you try to pull some boost with Lemmi, you will get rid of the code by reducing the low RPM negative boost deviation.. However, from what I've seen you'll cut throttle in high RPM due to a positive devation once you lower boost enough to get rid of the low RPM negative boost deviation. Some of the fastest S4s on the planet are running XR + TCD and have negative deviation code, nothing to worry about as it has no negative effect whatsoever.

-SlowSilverTIPJason- · 09-05-2005, 02:06 PM

PSmalls::DoggieStyle · 09-05-2005, 02:07 PM

09-05-2005, 01:06 PM	#1
1SeriousPig Junior Member Garage is empty, add now Join Date: Dec 2004 Posts: 535	got a code today, charge pressure negative deviation, what the hell is that? __________________ _______________________________

09-05-2005, 01:10 PM	#2
*O.W. Kenobi* Rest In Peace Garage is empty, add now Join Date: May 2001 Posts: 19,412	Write the code down, plug it into STFA before asking us, and see if that solves your problem. You'd be surprised what you might find in the archives. Chances are, someone has had the same code and posted about it before. __________________ ======================================== My track videos * Brake FAQ * Kenobi lock pump * Kenobi hazard relay * Lidatek install * 43k oil analysis * 51k oil analysis * 60k oil analysis * 68k oil analysis * 76k oil analysis

09-05-2005, 01:13 PM	#3
-SlowSilverTIPJason- Senior Member Garage is empty, add now Join Date: Aug 2005 Posts: 5,504	It means your actual boost is lower then the requested boost, either bad boost leak or N75 valve. __________________

09-05-2005, 01:22 PM	#4
burningcoals New Member Garage is empty, add now Join Date: Feb 2004 Posts: 474	what are your mods are you running TCD? __________________ X Sauce RS4 Grill RS4 Clutch RS4 18" Reps Custom SS AWE Twin1 AWE A-Pillar BG APRV1 Downpipes Test Pipes StaSIS Streets Forge BPV 20% Tint Phatnoise MBC Ready to be installed: K04's and assorted hardware...

09-05-2005, 01:40 PM	#5
TwinTurboTerror AudiWorld Super User Garage is empty, add now Join Date: Apr 2000 Posts: 13,277	Damn, you are one feisty mofo. 8^) __________________

09-05-2005, 01:42 PM	#6
PSmalls::DoggieStyle Elder Member Garage is empty, add now Join Date: Jan 2004 Posts: 30,257	Also can happen on XR with TCD or X+TCD+close to sea level (burningcoals).

09-05-2005, 01:51 PM	#7
-SlowSilverTIPJason- Senior Member Garage is empty, add now Join Date: Aug 2005 Posts: 5,504	What's the workaround with TCD and XR? Pull some boost w/ lemmi or L308X? __________________

09-05-2005, 01:55 PM	#8
PSmalls::DoggieStyle Elder Member Garage is empty, add now Join Date: Jan 2004 Posts: 30,257	There's no reason to work around it. Those with XR and TCD, run MBC only... Therefore, they get the code but it has absolutely no negative effect. If the N75 were in the loop, you'd go into limp mode. If you try to pull some boost with Lemmi, you will get rid of the code by reducing the low RPM negative boost deviation.. However, from what I've seen you'll cut throttle in high RPM due to a positive devation once you lower boost enough to get rid of the low RPM negative boost deviation. Some of the fastest S4s on the planet are running XR + TCD and have negative deviation code, nothing to worry about as it has no negative effect whatsoever.

09-05-2005, 02:06 PM	#9
-SlowSilverTIPJason- Senior Member Garage is empty, add now Join Date: Aug 2005 Posts: 5,504	gotcha, why not an XR for MBC guys to alleviate the DTC __________________

09-05-2005, 02:07 PM	#10
PSmalls::DoggieStyle Elder Member Garage is empty, add now Join Date: Jan 2004 Posts: 30,257	Huh? I don't understand. XR is what causes the DTC.

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