Passat (B6) :: CEL On / Code P0299 - How To Replace The Diverter Valve
Jun 24, 2013
The CEL on my Passat came on. When I scanned it with VAG-COM, the following fault code was displayed:
000665 - Boost Pressure Regulation
P0299 - 002 - Control Range Not Reached
The car also felt like it lost its power in some way, especially when the turbo kicked in. So after some research, I found out that the Diverter Valve was causing this issue. Rubber diaphragm on original valve was made from rubber and was torn. I replaced it with upgraded valve and wow what a difference!!! Very easy to do, great write up link below.
DIY Diverter Valve Replacement for 2006 VW Passat 2.0T
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Was cruising on the freeway and all of a sudden my exhaust sounded like it has a leak!!! I gave it some gas and it got louder but the car didn't pull like normal??? No check engine light or anything crazy. I don't think the inter cooler pipes blew off because the engine didn't shut down and I was on cruise mode.
Its sounds like the turbo wants to spool but cant hold boost, can this be the diverter valve leaking or its blown?? I haven't had the chance to check which diverter PN# I have but Im pretty sure its the stock OLD version. I am the 3rd owner. 07 Passat FSi variant with 36K miles.
I hear the 07 FSi are know to have bad or weak Diverters.... I know I needed to go with a stonger TSi Diverter which I hope is the problem here....
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The 1.8 passat turbo has 60k miles on it.
CEL is on, shop says it is code P0299 (I have read this code being called the "underboost" code). Local shop also wanted $1500++ to put on a new turbo. Car is driving and responding just fine.
I have searched high and low and can't find definitive answers to these questions.
I have read some posts indicating that replacing the Waste Gate Valve has improved performance and turned off the CEL. Can you replace this valve on the 1.8 without replacing the whole turbo?
Where is this valve in the engine compartment? Can I just clean it? CEL code 0299, car behaving normally, shop telling you that your need to replace the turbo?
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Where is this diverter valve located at ? Is it under the car?
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Having issues with the stock one that came with our cars I think I may be leaking from the diverter valve. I was searching the forum but couldn't find the answer but when I hit the gas I can hear I would say like the diverter valve is constantly releasing the air and the power pretty much plateaus doesn't keep pulling like it did I'm assuming the diverter valve because i know there were issues of them before but i wasn't sure if they had the same issue in the mk6.
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Is it normal if im in trying to brake for a stop light and its a little rough? I think its because the car is downshifting hard or warped rotors?. I have 77k on it should i do a tranny oil change? If so where can i get one? jiffy? stealership? Also i get the code P0299 with is underboost. Should i replace anything or just check tubes?
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If your diverter valve is bad, will it throw a CEL or not always? I don't have a CEL but sometimes I feel like there is a lag in the boost. Wondering if the diverter valve is bad or not.
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I currently have a 2011 DSG. I purchased it last year and when I test drove it I did not notice any unusual sounds coming from the motor/ drivetrain. However since then I have noticed that the car makes a grinding like sound when my car is around 2k-3k rpms, its especially loud under load. Its a very audible sound, like something is grinding in the transmission- Everyone that has been in my car can hear it, and it only happens at low rpms. Anyway, I took my car in once to service and I mentioned it, however the tech said he could not hear anything.
I honestly think that I got louder since then so I took it back and the shop foreman came out for a drive with me. So the guy hears the sound, but says that its the diverter valve and that its supposed to sound that way. He tells me its because the cars now have a metal valve and that its louder. I had a 2002 A4 1.8t and it never made a sound like that, even after chipped. So Im a little worried that its something else and I wont be able to get it fixed under warranty, or maybe im just paronoid and the DSG sounds like this.
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So the other day I replaced my N75 valve and upgraded my DV to the Forge 007. For some reason the turbo doesn't spool like it did before, it's lost it's pep.
I've tried the Yellow and Green springs, also I tried them with the shim too. No luck. The car got turbo back exhaust, intake, and stage one program.
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Sudden power loss experienced. CEL (Check Engine Light came on) and Glow Plug Light was flashing. Power loss is severe so really can't drive it anywhere. Turbo Failed at 5500 miles.
Mechanic quote: "Found code P0299 for turbo power under boost. Removed upper engine cover and intake hose. Checked turbo shaft and found play near intake side of turbo. Removed lower engine shield and lower hose to intercooler. Checked for metal. Contacted VW and created VTA. Instructed by VW to replace turbo. Did."
Sounds like service manager abbreviated when entering into the computer. In any case a shame that this car was in the shop for more than a week while the dilly dallied and waited for a turbo to be shipped in.
Some earlier turbo-fail threads from last summer stated dealer told them "bad batch" of turbos was being experienced by VW. Believable, particularly if they're banged out in China? Let's all hope it was a bad batch.
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Have 2001 suburban with the 5.3. Mechanic has replaced EGR valve 3Xs. Error code specifies "replace EGR valve". Each time car runs fine for 4-6 weeks (500-1000 miles) and then service engine light comes on. Shortly thereafter the car will not idle correctly (under 1,000 rpm) and will die at stop. I think the EGR valves are getting clogged up with carbon. Car has 130,000 miles on it.
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I started my Subbie and all the lights just start going crazy on my dash. So I pulled of the road and started freaking out, Never had a hint of a problem. So I pulled in AutoZone and they ran the codes and now I'm being told I have to replace the brain to my transmission WTH? I don't own a DODGE!!! Had 3 different dodges and the tranny went on all. So I wont own one because of transmission problems. Now my Subaru has been parked since it can only get worse. Is this normal? All the error codes are...
P0700 Transaxle Control System (MIL Request)
P2762 Torque Converter Clutch Pressure Control Solenoid Control Circuit Range/Performance
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Im replacing my PCV valve (CEL) but im not sure if I should replace it or just the breather hose.
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I'm at a loss here with my 2011 Sonata. 2.0 Engine blew last Oct took dealer 3 months to finally get that taken care of. Had car back for just a month and while hammering down to pass a truck something popped and and the car lost about 1/2 its power.Car would only do about 75 mph floored no power.Gut less on hills even more so.Took to local Hyundai dealer and the performed the usual test etc said they were getting a P0299 code supercharger under boost code.Other test revealed a internal intermittent short with the turbo,so they decided to change turbo.After new turbo installed car has slightly more power but nothing compared to what it should be.Can't even hit 100 mph with it ! Told dealer car still not right,they told me all is working as it should be lol...When ya get on the gas ya hear a slight whining noise like a turbo whining it made this noise before they change old turbo as well.To me it as is there is no boost what so ever but yet they say all is ok..
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Just wondering if I will know via a check engine light if when my Diverter valve may act up. I don't really want to add a boost gauge if I can let the onboard diagnostics do the work for me. So if I loose boost will I know?
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I have a 2011 ecoboost with 69000 miles and I am starting to get the dreaded P0016 code along with the occasional P0299. I am almost done making payments on it but I am hesitant about sinking the kind of money that it takes to repair the timing issues. SO the big question, is it worth keeping and making the repair or should I trade it and get a new 2016??
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At 65 mph, egt was running between 1050-1150, turbo at 13-14 psi, rpm 2300. Code p0299 pops up. Before this the turbo would spool up to 28 psi going up hills. After it would not go over 16 and sounded funny. Truck is a 2005 excursion 4x4 with just under 200k miles . Trailer is about 10k pounds. No tuner. What do I need to be looking into? Is this too much for the truck to handle?
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I just got back from a trip across the state to see the Miami boat show! Truck was running just fine on the trip over, EOT/ECT delta around 9* (seems a little high to me, Im hoping because im running 35's, but can someone back me up on this?)
On the trip back, cruising at 70, I noticed the check engine light went on... I didn't have it under heavy throttle or obscure circumstances... My ScanGauge 2 showed that I had a P0299, which as Ive read means something relating to underboost?
I cleared the code. And the CEL never showed again in the last 100 miles... Could this just be a quirk? Or should I be more worried about it?
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Can a leaking Y Pipe throw a P0299? Dealership says that is my problem. My MAP at idle is 14.4 EBP is 17 - 18. At 60mph MAP is 20 EBP is 26-28. Boost is 10-20 .. Truck drives great no apparent issue. P0299 only code and appears when cold first start of day. If I clear it it goes away for the rest of the day and only comes back occasionally. Twice in 5 days only at cold start. 2005 F350, 100% stock, Ford filters all. Scan guage 2 for readings....
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I'm having a little trouble with my 05 Excursion 6.0L .... We took off camping the other day pulling our 30' camper and the engine light came on pretty much as soon as we hit the highways. I checked my Dash boss and it came up as P0299 under boost condition. The truck never skipped a beat. The boost gauge never dropped and it seemed to have lots of power. Actually I've noticed too much boost while pulling. It's climbed up to 36psi before and was still climbing when I backed off the throttle. I'm thinking the turbo is fine but not sure what to check next.
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He has a 2013 F-150 XLT with the Ecoboost. He has 29,000 miles on the truck.
He is ~1,300 miles into his trip; and has about another 4,500 to go! On Friday, his check engine light came on (while towing). The next day it went back off. Yesterday, the light came back on (while not towing this time). He took the truck into a Ford Dealer in Rapid City, SD this morning. The CEL light was still on this morning when he arrived at the dealership. The dealership said the code is P0299 - Turbo Underboost.
They said they've run tests and can find nothing wrong. Naturally, he is not very happy being this far from home with 3 more weeks of vacation left and his truck acting up. Especially since the CEL light is on but the dealer can find nothing wrong. I'd be puckered-up too!
Experienced this Turbo Underboost condition? What was the cause? How can the CEL light be on but the dealership not be able to find a problem?
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