5671 fault code, p0299 boost pressure regulation, control range not reached

[Linksman72]

Any help would be appreciated. Just changed to the ko4 turbo and I still have this error message. I thought my turbo was going bad so I replaced it with the APR ko4. Still getting this error code


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[old guy]

Diverter valve.

[Linksman72]

I checked the diverter valve and its the revised piston style so I assumed that it wasn't the problem. But I can try to purchase an aftermarket dv and see if this solves the issue. Any recommendations?


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[wkhanna]

i like the GFP-DV+
i also replaced my PCV when i got the underboost code...
replace the soleniod for the DV too....

got all my stuff from esc......V happy with the the price & tech assistance.....

[ILVTRANCE]

i like the GFP-DV+
i also replaced my PVC when i got the underboost code...
replace the soleniod for the DV too....

got all my stuff from esc......V happy with the the price & tech assistance.....

I installed the GFB. Turbo makes no bad sounds.. what is the PVC? how much to replace & where is it located? Where is the solenoid for the DV?

[wkhanna]

re: PCV aka, Pressure Control Valve see THIS LINK

the solenoid is what you bolted the DV to: LINK

[ILVTRANCE]

re: PCV aka, Pressure Control Valve see THIS LINK

the solenoid is what you bolted the DV to: LINK

Thank you kind sir :)

[ILVTRANCE]

So I as hoping for some of your thoughts.

stage 1 apr
No dentist drill sound from turbo
replaced DV with the GFB +
still notice lack of power
p0299 code came back

Should I bother changing out the PVC?

OR should I just take it to an indy shop and have them give it a once over?

[wkhanna]

as a matter of pro-active general maintenance & based on the age of the vehicle (2010), i (already have) would replace the DV, the solenoid, the PCV & the N75 valve out of practical precaution.....
as these early generation items are known for premature failure, are made of inexpensive materials & are cheap & easy to replace......
also, make absolutely sure there are no leaks in the system.....

i think it should just be looked at as general maintenance to replace everything, whether experiencing problems or not.....
not making any guarantees that it cure the code tripping, however ........

i have read (only) of some folks having issues with the code tripping after tunes, even though the tune is working properly......

worst case is your turbo is worn out......

[ILVTRANCE]

as a matter of pro-active general maintenance & based on the age of the vehicle (2010), i (already have) would replace the DV, the solenoid, the PCV & the N75 valve out of practical precaution.....
as these early generation items are known for premature failure, are made of inexpensive materials & are cheap & easy to replace......
also, make absolutely sure there are no leaks in the system.....

i think it should just be looked at as general maintenance to replace everything, whether experiencing problems or not.....
not making any guarantees that it cure the code tripping, however ........

i have read (only) of some folks having issues with the code tripping after tunes, even though the tune is working properly......

worst case is your turbo is worn out......

Thanks again for your reply its much appreciated. I will take care of the common maint things and keep my fingers crossed its still "turbo time" (said that in Arnold voice)

I have had my tune since late December and never a code until now. :(

please send me your good vibes that its just these small things.

[wkhanna]

i would have a leak check done, if possible....

also, can you take it to the same place that did the apr stage 1?

please send me your good vibes that its just these small things.

of course.....goes without saying....

but just to let you know....i have been trying to solve the V same issue for a few months, now....
the only dif is i only seem to be low on power once in a while, during initial acceleration.....

most likely i am looking at replacing the turbo some time in the near future......

[julianwhitta]

Like TRANCE, I’ve a had a tune (two, actually) on the car (FL, 2012 build) since mid to late 2015, and never thrown a code. Following a recall service about a month ago, bingo - 5671 fault code, same p0299. The recall was intended to address an issue with debris in the coolant network that may accumulate in the auxiliary coolant pump, causing it to overheat and, potentially, lead to a fire behind the firewall. Apparently an issue that’s seen several cars in both the US and the UK burn out, and NOT in the tyre-frying way! News to me at the time, I have to say.
Anyways, the recall involved a coding fix to run the coolant system (fans, pumps) for a set time after the car has been shut down. And, that’s when the error code surfaced. I’m prepared to swear on a stack of bibles that the code didn’t occur before the car went in (got the ECU status dump, taken the day before the car went in).
So, I’m wondering if this is just coincidence, and I’ve got a duff DV, PVC and/or N75, or if there’s actually a conflict between the tune (currently OEM+ from RacingLine) and the recall coding? Thoughts?

[wkhanna]

whoa....that throws a curve into the mix fur sure....

thanks for the info, Julian.

[julianwhitta]

Yeah, kinda thought it might. There’s all manner of physical things that can go wrong with a turbo installation, but throwing a possible software conflict into the mix lifts the game of finding the problem to a whole other level.
A few thoughts on the matter:
1. When the code first appeared, I hooked up my trusty Carista dongle and ran OBD Fusion to get some real-time data on boost levels. The numbers I got back LOOKED okay to me, but I was guesstimating what constituted “okay” as I’d cunningly failed to get baseline boost values from before the recall was applied. Anecdotally, I haven’t felt the car driving or performing any differently at all since the fix - still got its remap-inspired get-up-and-go - other than the bloody fans humming away for a minute or so every single time I switch off the car.
2. It may be that this possible software conflict is nothing more than the updated ECU coding coming across a stream of data generated by the remap that it simply doesn’t understand, and reaching for the nearest faulty code that looks like it might fit what it sees. The remap code stream is harmless, having no impact whatsoever on the ECU or the turbo but, because the ECU doesn’t understand it, it has a hissy fit. Anyone who’s played with computers at length will be familiar with this phenomenon.
3. Irrespective of whether there’s a software conflict, or an actual component failure, what we’re missing in all this is some baseline numbers for the turbo’s performance. What’s a normal boost pressure range for the turbo fitted to the 2.0 litre T? What do standard vacuum ranges look like? What sort of numbers would indicate an issue with the turbo under-, and for that matter, over-boosting? Any one fancy hooking up something like OBD Fusion to get some numbers on both unremapped and remapped cars to lay down a data framework we can operate within?

[julianwhitta]

One other thought just occurred. I’ve got GFB’s DV+ fitted (love it to death, and highly recommended) but with the softer spring fitted. It occurs to me that, if the softer springing allows the DV to dump pressure too soon, that might result in a “control range not reached” type error...
Never mind. I just realised that both Linksman and TRANCE were having the problem without the DV+ fitted. Still, might be an issue for those WITH the DV+?

[ILVTRANCE]

yeah mine popped up out of nowhere after a long trip.

mine is a 2011 P+ car was completely stock. I went APR stage 1 last December. Car ran great until about a month ago when I first got the code.

So far only had the DV changed with the GFB +. I'm not sure what spring was used. I tried to do it myself, but couldn't get to the last bolt :/ so had local Indy Audi shop do it for about 95$

The car feels stock again at this point. Before the code resurfaced I was like did they steal my ECU and put in a stock one?! LOL.. then the code came back on :*(

[wkhanna]

...... what we’re missing in all this is some baseline numbers for the turbo’s performance.

What’s a normal boost pressure range for the turbo fitted to the 2.0 litre T?

What do standard vacuum ranges look like?

What sort of numbers would indicate an issue with the turbo under-, and for that matter, over-boosting?

EXACTLY...!

Any one fancy hooking up something like OBD Fusion to get some numbers on both unremapped and remapped cars to lay down a data framework we can operate within?

Sorry, i do not have access to any tuned cars.....

i did just get a HEX-V2 (& Podi boost gauge) this weekend....

[wkhanna]

fyi....& a bit "off Topic" ......this is the email (on 9 July) i got back from Jonathan at GFP regarding my questions regarding the different spring spring configurations.......

Hi Bill,

You are quite correct, there are 2 options when installing our DV+ valves. Put simply, if you run your T9351 without the main piston spring, there will be no performance gain over the standard valve. The only advantage will be reliability as the factory valves are notorious for failing eventually over time. By installing the main piston spring, this is where you will get the full benefit of the DV+. The added benefit over reliability when using the main piston spring is the mid throttle response you will gain. We mention the manual cars because this is where you will feel most of the benefit, since you are constantly on and off the throttle. You still definitely feel the throttle response benefit when using an automatic vehicle though, but you wont feel it between gears since your foot will not come off the throttle. The only negative is that some vehicles may experience what we call a “soft engine code”, which is an indicator that there is too much boost earlier than requested in the rev range because the valve is closing much faster than the original unit and rather than bleeding the boost back to recirculate it, it’s putting it into the engine where it belongs! The modifications shouldn’t have too much effect on the likelihood of the soft engine code appearing either, but reflashing the ecu will definitely alleviate this problem and maximise the benefit, like any other modification. Hope this helps. If you have any further questions, please email me directly and I will respond as soon as possible.

Regards, Jonathan

Jonathan Tsiklas | Mechatronics Engineer
Go Fast Bits
No 2, Norman Street, Peakhurst 2210
T +61 2 9534 0099 | F +61 2 9534 3999
E [email protected] | W www.gfb.com.au

[julianwhitta]

Sorry, i do not have access to any tuned cars.....
i did just get a HEX-V2 (& Podi boost gauge) this weekend....

Untuned cars are perfect. They’re the ones that will give us baseline ranges for turbo pressures and vacuum.

[wkhanna]

i did just get a HEX-V2 (& Podi boost gauge) this weekend....

Untuned cars are perfect. They’re the ones that will give us baseline ranges for turbo pressures and vacuum.

you will have to give me a little bit of time.......
i just had surgery for an inguinal hernia.......it may be a week or so before i am able to crawl under the dash to hook up the Hex-V2....lol....

in the meantime, i will be downloading the software & attempt to do my best at learning its functions.....

....you have to understand, i come from the age of dual-point distributors, carburetors & adjusting advance curves using springs & weights......hence, the reference to my location.....Land of Archaic Anachronisms....

[julianwhitta]

I get it, hanna. I come from the same place, just the next suburb (or two) over. Which is not to say that I actually miss trying to balance a pair of twitchy Weber twin throat 40 IDFs, free a jammed up SU piston, or recover a distributor weight spring from the bottom of the @#$&ing dizzy bowl!

[wkhanna]

I get it, hanna. I come from the same place, just the next suburb (or two) over. Which is not to say that I actually miss trying to balance a pair of twitchy Weber twin throat 40 IDFs, free a jammed up SU piston, or recover a distributor weight spring from the bottom of the @#$&ing dizzy bowl!

sounds as though you & i would get along just fine setting the valve lash on a desmodronic & having a few beers.....lol

i will keep you guys posted on my progress....

[julianwhitta]

Indeed. I’m led to believe that the approved method of setting valve lash on a desmo IS having a few beers!

[old guy]

I'm right there with you. My first performance mod was typically to replace the SU's with Weber DCOE's.

[wkhanna]

HaHa!

we should start a sub-forum......

"curmudgeon's korner"......

[julianwhitta]

I’m in! Mind you, there are those who would suggest that whole sections of the forum already qualify, and that formalising that would be entirely redundant.

[old guy]

I’m in! Mind you, there are those who would suggest that whole sections of the forum already qualify, and that formalising that would be entirely redundant.

I dunno...I suspect I could be calling both of you a bunch of young whippersnappers.

[wkhanna]

I dunno...I suspect I could be calling both of you a bunch of young whippersnappers.

quite possible.....as i enter the 6th decade in a few months.....

btw, old guy, i see your are in w maryland.....cannot be too far from me in pittsburgh...?

[julianwhitta]

OMG! I’m surrounded by OLD people! Here I am, a mere strip of a lad at 58... Let’s skip the curmudgeon sub-forum and start a zimmer frame races one!

[old guy]

quite possible.....as i enter the 6th decade in a few months.....

btw, old guy, i see your are in w maryland.....cannot be too far from me in pittsburgh...?

I live in Hagerstown Maryland. It's a couple hours away from Pittsburgh

[old guy]

OMG! I’m surrounded by OLD people! Here I am, a mere strip of a lad at 58... Let’s skip the curmudgeon sub-forum and start a zimmer frame races one!

Let's go for it! I removed the tennis balls and put wheels on the front of mine ;-)

Bring it on!!

[julianwhitta]

Sweet. I’m thinking of getting mine wrapped. I thought about Nardo Grey, but that’s a bit close to the raw aluminium. Maybe Sepang... Anyway, definitely doing CF mirrors!

[osugsxr]

recently had the p2099 code as well for the past few months on a stock DV. This afternoon I finally installed the gfb dv part I purchased a month ago or so. I cleared the fault codes with a ross tech cable. Took the car out for a casual drive for awhile and then did some hard pulls into 6k + rpm range and NO CEL !!! Previously I would throw a CEL in this range and when pulling hard. Car seems a tad bit more responsive, arrived home again to do another scan. No fault codes came up, so I hope this has solved my issue, so far so good.

[julianwhitta]

Sounds like you may have had a duff diverter valve. Good that the DV+ seems to have fixed the problem. I’m starting to suspect that my own problem might be a sick DV solenoid, and that the fault code appeared coincidentally with the recall service. I’ll replace the solenoid this week to see if that improves the situation. After that, and if the code still persists, I’ll do the boost pressure solenoid.

[julianwhitta]

Let's go for it! I removed the tennis balls and put wheels on the front of mine ;-)
Bring it on!!

Ha! I’m not nearly as green as I am cabbage-looking, buddy! You think I don’t see the lightweight gloss black 5 spoke performance wheels, or the strut brace!? Not to mention the competition-grade all polyester polo top? I know when I’m being suckered!

[Linksman72]

Any help would be appreciated. Just changed to the ko4 turbo and I still have this error message. I thought my turbo was going bad so I replaced it with the APR ko4. Still getting this error code


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Ok just installed the GFB-DV+. Took 30 minutes to install and took her out for a quick spin keeping my fingers crossed that this solves my P0299 error code. I immediately noticed an increase in boost, and finally was able to feel the power of the new Ko4. Haven't cleared the check engine light yet, but I believe that the piston style diverter was the problem. Throttle response feels great and boost is held nicely al the way to redline. I'm happy . Installing a P3 gauge in a few days to get a boost reading


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Update: check engine light turned off within 20 minutes of driving. Problem resolved

[wkhanna]

this is good stuff, Linksman!

i was playing with RossTech HEX-V2 for the first time this weekend on The Wife's 2012 B8 A4 2.0t...
i got mine used with only one VIN code out of three left that i can log to use all the features & take measurements......
.....looks like she may need a new O2 sensor....


my car (2011 B8 A5) is at the shop getting cosmetic repairs due to being hit while parked in the garage at work.
hope to be able to get some data next weekend.....