N75 valve symptoms tdi This is necessary as excessive boost would result in engine damage. Red boost connected to Blue wastegate. Boost pressure pressurizes wastegate chamber and opens wastegate to relieve boost Next remove 2 5mm bolts from the crankcase breather hose on the turbo inlet. I am experiencing these same symptoms. They're the same valve with different colored tops 2. Things to note to indicate a car is modified as rule in turbo cars for boost. so if you see 100% that means 0% vacuum is being passed -valve is fully closed, not passing any vacuum through, so vanes wide The follow procedures apply primarily to VW TDI engines with variable nozzle geometry turbos; >1998. Joined Dec 1, 2003. I look and The n75 was the J model that I swapped in for the stock one. 2) Symptoms included a sudden drop in engine performance and power. Thread starter Steve777; Start date May 1, 2017; S. but a failed MAF rarely stores a fault code so the best thing to do is get the fault From this I assume the N75 must be faulty, but my symptoms do not seem to match what everyone states for a faulty N75. Possible Symptoms. Symptoms were what felt like limp mode but could not be cured with a cycle of the key. 0 TDI ? Pour tester le fusible d’une Driving around atm with the n75 valve unplugged and no boost. May 1, 2017 #1 TDI 2001 Golf TDI, 2005 Passat wagon, 2004 Touareg V10. The valve is working perfectly, now. TDI '04 Jetta GLS TDI Pumpe Duce Platinum Grey w/ Leather -Vacuum checked the N75 valve itself by removing it from the car and capping the atmospheric line and the line to vacuum and then hooking up a vacuum gauge to What are some symptoms of a bad n75 valve? Im experiencing a problem where sometimes when i step on the gas WOT im not getting full power but if i fully let off the gas then step on WOT again it will have full power. this solenoid can turn on Sounds like the symptoms of a bad n75 valve. A4 engines N75 use vacuum and the entry point of that vacuum in the system should be the air filter, hence a nice fresh source vs. Diagnosing a broken wastegate frequency control valve can be difficult, but a common symptom is a lack of boost pressure with no boost leak present in the system. Sep 8, 2011 4,331 3 birmingham. Sluggish low rpm response since I bought at 130k miles. I tried putting the stocker back in and only boosted 10-11lbs. * Solenoid Valve for Boost Pressure Control (N75) defective Possible Solutions * Check Hoses/Pipes to/between Components Possible Symptoms * Reduced power output * Limp mode Possible Causes 1 17958/P1550/005456 - Boost Pressure Control Valve (N75): Control Deviation 1. Joined Dec 2, 2008 Messages 17,400 Reaction score 1,100 Points 113 Get Audi parts here: https://amzn. how should i go abouts finding the problem. This graphic shows how boost pressure from the turbo is used by the N75 to regulate pressure to the wastegate actuator, as found a faulty mass air flow sensor (MAF) is a more common cause for loss of power on tdi models. And the duty cycle of the N75 is courtesy of kaipyroami in one of the other threads about the N249 with tons of info here: I've owned turbocharged cars in the past and the symptoms point to a sticking wastegate or perhaps faulty boost management (hence N75) so do these symptoms match? so do these symptoms match? What is the part number for an 02 S3 BAM N75 valve? Westy Registered User. If you have confirmed that the actuator is healthy, the N75 is the next most likely culprit. I would appreciate any advice or direction. Lightly pressurized the engine while listening to the breether. After issues with the running of t S4 / RS4 (B5 Platform) Discussion - What are the symptons of a bad N75 valve? - What are the symptons of a bad N75 valve? LOG IN; REGISTER; Forums. 8t petrol and replaced the n75 valve as it was faulty - symptoms were that on acceleration it would boost, then die, then boost, then die again and so on. Reduced power output; Limp mode; Possible Causes. Symptoms There is a sudden change in engine The N75 valve controls the turbo wastegate actuator via directing air pressure to it by actuating a tiny solenoid when the ECU decides its neccesary. C. No bumping in intake. hey guys. 8T Discussion - N75 wastegate actuator valve explained/symptoms. It is independent of the vacuum system. I would assume since I can get to 21psi, The n75 will stay low, trying to increase airflow but maf stuck at 280. 1 Possible Symptoms 1. 2 Possible Causes 1. The N75 valve fails slowly over time, gradually reducing the power your engine makes, so you might not necessarily notice it has What about the n75 valve? Does limp mode cause very bad mpg? P51 Finding my way. Today while trying to diagnose if my actuator is leaking I used a vacuum pump to test both lines that go to the n75 valve and they all hold vacuum very well, I could also visibly see the actuator arm move smoothly with my The symptoms you describe are very similar to a weak MAF. Might be the N75 or associated plumbing. Back to Subforum. Joined Aug 19, 2009 Location NH TDI 2017 Alltrack SE; Totaled 2015 Passat SEL, BB 2010 Sedan Man; 2012 Passat SE w/ Nav, Re: n75 valve delete?? (vr6slc. Capthook Verified VCDS User. Join Date Dec 04 2007 AZ Member # 23095 My Garage B7 S4 Avant Location So Cal/La Jolla You've provided zero info about your car, so I'm going off your user name that you have a 2002 Jetta/Golf TDI ALH. You’ll be able A4 (B5 Platform) Discussion - symptoms of a bad N75 valve? - my car has been in limp mode for like a month. Boost Pressure too High; Hoses/Pipes incorrect connected, disconnected, blocked or leaking; I have drawn a schematic of the operation of the N75 valve, and there are photographs of the inside. 5stroker Well-known member TDI 2006 Jetta 5 speed 157K(to replace 09 when it goes away)2009 Jetta 6 speed-414K (and climbing), 2002 chevy duramax (303k and climbing). in my case is that the scanner code did not require me to replace the turbo like the part person stated but replace the N75 valve Guest, CUPRA and SEAT valve caps are now available! 👉 Order now from the merchandise store. (new timing belt at time of purchase) Now at 150k miles and I get P0299 boost code with limp mode sometimes. Unplug and remove the valve. I do know on my car, before the valve, I would hit 16-17 psi on apr 93 v1, and then hold like 12-13. Ran VAG-COM on it and got the following: 17964 - CHarge Pressure Control Negative Deviation. When the wastegate actuator opens the wastegate, exhaust gases are diverted away from the turbo. TDI 2003 VW Jetta 1. Run a 12v l hi i just bought a passat an went to see how the turbo when, an nothing, guttless, ive bben reading on here an checked a couple of things an still unsure, i took a vacume hose off what i believe is the n75 an no suck not even a little, is the n75 valve gone or is the mass air flow causing it or sticky vanes in the turbine housing. Check wiring and connections; Check / Replace N75 Audi A4 B6 Tdi Skoda Octavia "down and out" Save Share 17956/P1548/005448 - Boost Pressure Controle Valve (N75): Open Circuit Possible Symptoms . Check Hoses/Pipes to My N75 valve just bit the dust and did no humming or anything. It usually will start once the ECU has a chance to adapt to the new valve. I lost all that power I was so proud of having earlier. this could be A4 (B5 Platform) Discussion - What are the symptoms of a broken N75 valve? - I was testing a theory by dialing down the boost using my N75 You see, I was having a problem, where I was getting a positive deviation code and going into limp, but it was soft limp where eventually the boost would creep back up. I am no Audi me N75 valve, MAF sensor, MAP sensor, Vacuum tested vacuum reservoir tank and lines in place and N18 valve, Cleaned intake manifold, turbo, EGR, and boost passages, And still getting high pressures. See my thread below for more details otherwise I can answer any questions. Controle electrovanne N 75 de suralimentation Électrovanne de contrôle de la pression de suralimentions (N75) Dans cet article, nous plongeons dans le fonctionnement détaillé de l'électrovanne N75, un composant essentiel (67 239) FUSIBLE GOLF 6 2. Is this 'turbo pressure control valve' the N75 Valve ? Do you think these are symptoms of a faulty turbo pressure control valve ? Is it possible to repair it? How much for a new one I just ordered a new N75 valve and Pressure regulator valve from ecs so hopefully the n75 fixes it 01-14-2009 08:17 PM #5. there seems to be nothing wrong excepti can't get over about 3psi by nothing wrong i mean, it's smooth, no bad sounds, not doing anything bad. 5 TDI N75 Valve. Save Share Reply Quote My Car's Boost is not as it should be and I have a suspicion that it is the N75 valve also known as a boost control valve. The turbo is a vacuum modulated device. Return this item for free. New Member Welcome Area a4, audi, b5, bad, badn75, boost, erratic, faulty, gti, n75, signs, symptoms, systoms, tt, valve. Oh well, more money. The N75 (charge pressure control solenoid valve) has all 3 pipes coming out of the same side, as in drawing N21-0101. 3 Possible Solutions 17958/P1550/005456 - Boost Pressure Control Valve (N75): Control Deviation Possible Symptoms Irregular behavior Reduced power output Limp mode Possible Causes Van not running smooth when accelerating in low gear (jumpy) and making a loud moo sound from under bonnet when engine turned off. This is a random behaviour, sometimes is there, most of the time doesn't. im just having horribly consitancy with my boost. The only difference I can see is that with a MAF problem you can still get peak boost (23 lbs in my case), then it rapidly drops off to 10 just like you said. Ran a scan and it shows short to ground on N75 amongst others. 0 mg/str Here comes the N75 valve. 26 then fluctuate down to 23. If the turbo would directly linked to the wastegate, it would not be able to produce lets say more than 0. any reason to suspect the N75 valve bleeding off a little boost to The way it works is the n75 valve receives a reference boost air pressure into the bottom port which is from the passenger turbo boost side, this is then directed through the n75 valve exiting the right angle port to each 2006 jetta tdi I did the cam and rockers at about 150,000 along with MAF, o2 sensors, because I had smoke and low power. It doesn't "vent" to the airbox. Visit the JDMSPEED Store. Wiring and/or connections faulty (short circuit) N75 faulty; Possible Solutions . When a car tailgates me, i slow down - then floor it and give them a cloud of diesel smoke to choke on 01 VW Golf MK4 TDi Estate Ex - 00 Triumph Sprint ST(Stollen) Ex - 83 Caddy Ex - 02 Audi S3 Ex - Kartcraft Kestrel beach Buggy Hello and welcome to the SPOOLIN UP channel. 9 TDI BEW. Now that testing a boost solenoid The basics of the N75 Waste Gate Frequency Control valve: how it works alongside the waste gate actuator, the waste gate itself and the turbo. 5 out of 5 stars 55 ratings. Mar 18, 2013 #2 The N75 valve is like a switch controlling the turbo wastegate actuator. N75 valve shifts. One happens to be mine. The apparent cause was a loose clean air line from the N75 valve to the air filter box The N75 Boost Valve on the Golf TDI can cause sluggishness on acceleration. I dont think its ever been changed, Im no the first owner, but Ive had it for about 20,000 miles and I havent done it. Its very strange. The customer brought it to me with the following symptoms: Hard to start Poor idle speed Stalls as soon as you try to move it in gear The codes: ASV actuator N239 open or short EGR actuator N18 open or short Turbo actuator N75 open or short Cold start valve / advance solenoid N108 circuit malfunction Glow plug relay J52 open or short Just bought a 03 plate Caravelle 2. 5 tdi 88bhp has been re-mapped by a well respected UK re-mapper to around 117bhp and I've also fitted an EGR blocking plate. Make Sure You Guys Smash The LIKE Button On This Video And Subscribe j'ai roulé aussi avec une N75 en vrac, tuyaux cassé mais sur un tdi 110 :P (N75), puis voir la Dump-valve. On freeway WOT 4th and 5th gear, graph on VCDS shows specified 1940 mbar, actual boost 2350 mbar. It's just lost a lot of its movement and started hanging up. Recalling to check the N75 I put the N18 in place and it runs awesome. I bought a new n75"F" (i think) OK, background, 2005 Jetta 1. If the N75 has a number below 50%, the ECU is requesting more boost, and if the number is above 80% the ECU is telling the N75 valve to lower boost. By TDI-Rob in forum A6 - S6 - RS6 - - Archive Topics Replies: 1 Last Post: 07-08-2009, 04:36 PM. I've never had mine go bad, but it has come unplugged. Its on the very front of the turbo. Now with this valve and a 3" downpipe, it hits 21 psi, holds 17-19 depending on what gear I am in, and then slowly tapers down after 4500 rpms to about 12-13 at redline. We will be changing it in thgis vi 1) The document describes troubleshooting a low power issue in a TDI engine caused by a leaking N75 valve. So I replaced a few vaccuum lines and tested the check valve next to the N75. For future reference, too costly at dealer, may attempt repair thru mechanic friend who will kill me: I removed the N75 solenoid valve N75 Valve EGR Valve MAP Sensor VNT Mechanism (Should have 1 inch of movement) The problem of low boost pressure can be caused by: N75 Valve (and VNT Mechanism) 1) Boost pressure control valve (N75) located on the bulkhead behind the engine. com/shop/carguysupplyTesting the n75 valveit works ha. 169K posts 109K members Since 2007 A forum community dedicated to Audi, Volkswagen N75 output test (BEW TDI) Thread starter Capthook; Start date Sep 6, 2023; Status Not open for further replies. So I think my n75 must be operating properly. If your problem persists after this, try running a MBC in parallel with the N75 valve. Re: Understanding the N75 valve, schematic with details and connections (zeusenergy) Here's some more info. Symptoms: Boost is very erratic. 8t with the following mods: APR 93 octane program, APR R1 Diverter Valve, APR 2. someone suggested bad N75 valve? right before it limited itself so im thinking i have a faulty n75 valve but i dont know for sure and def dont wanna blow money and not have that be the problem. May 4, 2017 #5 CoolAirVw said: Best way to check is to do output tests with vag com with a vacuum guage on the output of the n75. For those without access to VCDS, another method of testing can be used prior to installation. no CEL either. 0 TDI Comment tester un fusible sur golf vi 2. S4 / RS4 (B5 Platform) The N75 operates on turbo pressure, not vacuum. MAF replaced ~10k ago. ) i know i need to install a mdc. 5" catback exhaust. My symptoms are a blinking glow plug and MIL. 3. Possible Symptoms. So the TDI & VR6 valves are the same? Someone needs to take some pictures of what this valve looks like and where it is. New TDI N75 Boost Pressure Solenoid Valve Mk4 Mk5 Jetta Passat Beetle Golf 00-06 . Remove the vacuum line at the N75 solenoid valve and apply vacuum to the line. Steve777 Veteran Member. If all above potential causes check out, replace the N75 valve. Red boost is blocked, Blue wastegate is open to Black atmosphere to keep wastegate closed. The N75 valve is inserted between the turbo's high pressure output and the wastegate. Full travel from the stop is about 1cm. I did the initial swap in the rain, and I think the water damaged the stock valve. Reduced Power Output Overrun Cut-Off until Boost pressure falls to a non-critical level; Boost Pressure too High; Possible Causes. 5" Downpipe, Milltek 2. If air is escaping out of the long turbo inlet pipe stem, your valve has failed. AudiWorld Community. 88 $ 25. The hose is flexible enough to be moved out of the way and doesn't need to be completely removed. the n75 valve is a common topic. 2014 Passat TDI SEL Premium———>Family man now. I dont think its a boost in VCDS for EDC15 ALH cars the n75 value shows the percent the VALVE is CLOSED. That much boost seems very high to me! Follow the vac line to the N75 solenoid valve (solenoid is mounted on middle of firewall - look above the brake fluid reservoir). The N75 valve shares a common switched yellow/black 12v from fuse 34 (10A) via the J317 power supply relay with the cold start valve N108, MAF G70, EGR valve N18, and ASV N239. 88. So swapping mafs no go. Wiring and/or connections faulty (short circuit) N75 faulty . yet i have hi, i have the 1. The fitting for the pressure signal line on the compressor of some after market turbos does not flow Always check the wastegate actuator and MAP sensor if you suspect a faulty N75 valve. I haven't started any troubleshooting myself yet maybe I should ignore the VW mechanic's diagnosis and decide for myself. B5 SLPR. 99. then the next gear ill hit 25psi and hold till redline. Blow into the bottom stem, or use an air source. 8T will request stock 1650 MBAR APPROX 180 HP 1. Cause # 6 faulty N75 valve. The symptoms improved slightly but only push the limp mode a little later 75+ mph. and this is a very "on occasion" symptom sometimes ill try and do a hard pull, and boost in 2nd will hit say. the n75 is controlled by the ecu which sends it signals asking it to open or close, which in turn adds or reduces pressure on the wastegate actuator, which results in more or less boost. Regarding the N75 and N18 I searched and came across 2 separate opinions. When I use the selective test Solenoid Valve for Boost Pressure Control (N75) with the engine NOT running I get the following results: Mass Air Flow (actual) = 310. FWIW The n75 valve works by the ecu pulsing it open/closed faster for more vacuum, slower for less. Get Fast, Free Shipping with Amazon Prime. could be spiking 16 one day then 7 the next. 3) The root cause was determined to be a fine particle deposit inside the N75 valve preventing Check / Replace N75; 17957/P1549/005449 - Boost Pressure Controle Valve (N75): Open Circuit / Short to Ground Possible Symptoms . (There are two similar valves with vacuum pipes going to them; N75 is the one nearest the N75 wastegate actuator valve explained/symptoms. For no boost it sits open to atmosphere through the airbox. Can get up to 21psi and then next shift only boost to 14psi and holds there. Didn't trigger a chekc engine light, but the motor ran in hard limp mode Sounds like a boost control issue. After cleaning with intake cleaner and air, it now closes after a moment when blowing from the black side, or This information above is indicative of a boost leak, bypass valve faulty, faulty turbo/waste-gate, plugged exhaust, or faulty sensor such as MAF/N75 or N249. our dirty A3/B4 design. Does the maf value even change a bit? If not, I say the maf wiring may have a gnd or open OR ecu itself is dead where it senses Having turbo boost problems? Engine management light on because of this? Short video on how I fixed mine. VW TDI forum, Audi, Porsche, and Chevy Cruze Diesel forum. The N18 (EGR valve) has 2 pipes coming out 1 side, and 1 coming out the opposite side, as in drawing N26-0437 (item number 9). still have a funny issue with my stage 3 RS6 turbo-ed S4. The snow screen, air filter, intercooler, air stream is clean. 150 HP 1. 4 bar of Testing the N75 Valve. FREE Returns . The cutaway is from VW/Bentley I think. from TDIParts. I pulled off the vacuum line to the "N75" solenoid (before check valve) and plugged off the crank-case breether hose. All was well for maybe 6 months with huge amounts of power that sometimes caused the clutch to slip around 2000rpm. but do i leave vac lines hooked to the n75 or just leave it hangin and plug in with no vac lines?? and do i hook the mbc to the line that the n75 was hooked up too??? thanks sorry i know about turbo and stuff on more of the older style with out all this electical boost control Faulty Vacuum Modulator/N75 Valve – the vacuum modulator (called the N75 valve in VW/Audi world) controls the vacuum to the turbocharger actuator. Local guy says Sometimes my Jetta TDI hesitates between 1500-2000 rpm, when I aplly light throtle. . The cam was replaced about 30K ago with a cam from Kerma TDI. I have swapped the n18 and n75 and have not seen any improvement. Much cheaper alternative to replacing the turbo 😖😖 The N75 valve is vital to the health of your turbocharged engine, it controls when and how far to open the wastegate to allow boost pressure to be released. Remove the fabric heatshield from the turbo coolant line (4 snaps). I'm trying to figure out my low power situation. 8 August like a boost leak or fuel blockage, get a boost leak test done to confirm, I had an evo once that had exactly the same symptoms including very high fuel usage, the ability to rev to redline when not under load, and very restricted revs/acceleration If and when it does break, the stand alone n75 valve is a better option imo Sent from my EML-L29 using Tapatalk. This video shows how to replace the N75 Pressure Control Boost Valve on a VW Golf How would I know if my n75 is going bad on my AWP 1. $25. then in 4th ill hit 26 psi and itll hold to redline. How does the check valve affect performance? I am able to blow through the check valve either direction. That is, you still have the N75 plugged in mechanically and electrically, but you also give pressure another way to reach the waste gate if the N75 isn't reacting quickly enough. 4 bar of Previously owned 04 Golf TDI & 05 Passat GLS Wagon TDI Jan 26, 2010 #1 If you get a CEL / Emissions Workshop message, have the code read and it comes back with P0299 turbocharger underboost - please post what you did to resolve the problem to this thread. 9 Diesel GLS , Five Speed Standard Shift Apr 2, 2023 #13 John Wesley Hardin said: I was N75 Valve EGR Valve MAP Sensor VNT Mechanism (Should have 1 inch of movement) The problem of low boost pressure can be caused by: N75 Valve (and VNT Mechanism) 1) Boost pressure control valve (N75) located on the bulkhead behind the engine. amazon. 8T will request stock 1850 MBAR APPROX Only downside is that the N75 valve is located in a bit of a goofy spot, but you can get the whole vacuum system up and out of the car in one chunk after you remove the air cleaner assembly and air inlet tube to the turbo. The mostly the same valve but are sprung differently and you If you have VCDS, perform an N75 output test. Testing revealed the N75 valve was not properly sealing the vacuum line when deactivated. Cause # 7 worn out turbo. Black atmosphere is blocked. Remove the hose from the N75 valve going to the actuator. Irregular behaviour ; Loss of power ; Limp mode ; Possible Causes . (There are two similar valves with vacuum pipes going to them; N75 is the one nearest the TDI 2006 Jetta Manual, stock with Panzer Plate & Franko6 modified EGR cooler & CAM This then means that if the egr valve and bypass flap are both open, high pressure exhaust will actually displace intake air in the total air intake charge. When more vacuum is placed on the actuator, the turbo develops more boost. 8t motor? Just for reference its in a 02 GTI 1. - alright first off this is my first thread im posting on the audi forums, and ill try to keep posting about every problem i encounter with my TT as long as there isnt posts about the same problem already. Audi A4 B6 Tdi If you are getting an over boost issue, car goes into limp mode, P0234 code, or random boost pressures building, this could be what is wrong. I did not remove the valve-cover to diagnose the failed CCV. The vacuum line does go Is the N75 Valve BAD? The blue hose comming from the N75 does it apply vacuum or pressure to the wastegate? TDI Schmutz, 2015 Golf Sportwagen DSG & Schnurren, 2001 Golf GL 2 door 5M Dec 3, 2008 #3 The N75 on a mk3/b4 is a ~$50 part. 1. Im thinking it might be the n75. In this video I finally track down the fault putting my van into limp mode, bring up code P0299 Underboost. TDI 2005 Pasatt TDI , 2008 Mercdes E-320 Bluetec, 1983 300D mercedes (Sold :-( Re connected and drove again, same way. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright The N75 was designed to let the boost feed to the actuator, follow the red arrows, all the time (from 1 to 2 and 3 is blocked, in above pic) when there's no electrical current flowing or if the electrical plug is not connected. Got worse, brought to local shop (san diego, no tdi recommended guys). The rod should move smoothly beginning at about 3-5" vac and hitting the stop at 18-22". In this video I finally get around to diagnosing and fixing the MK4 GOLF GTI. Solenoid Valve for Boost Pressure Control (N75 . The N75 valve on ALH motor works opposite the regular line of thought. I have checked the spring in the actuator, when i checked for the diaphragm holding vacuum. Symptoms of faulty n75?? Thread starter W11TTX; Start date Mar 18, 2013; Forums. com pick one up and replace your vacuum lines (and check on the one in the ECU) and you should Here comes the N75 valve. When you don't have power at the N75 valve, check any Today On Project TDI #maxemissions We Replace The N75 Valve As Well As Our Vacuum Hoses. This is whats causing limp Yeah, if it weren't for the VW mechanics diagnosis, I would also be leaning towards the N75 valve as well. did cross my mind, so in that case im getting too much vac, and the N75 is alright, so failing the check valve, what else could it be? im completely stumped, and completely pissed off. I've got exactly these symptoms. The wastegate itself is normally closed allowing exhaust gases to spin the turbo. 3-0. 5 3. View Profile View Forum Posts View Blog Entries View Articles Veteran Member Three Rings. Irregular behaviour; Loss of power; Limp mode; Possible Causes . to/2tcA5KxMy Car Guy Supply Guide: https://www. thanks guys TDI 2014 Jetta Sportwagon,2003 Jetta 261K Sold but not forgotten No signs or symptoms of troubleI just glanced at the dash and the MIL light was on. they list a Wastegate Bypass Regulater N75, but the BRM has no wastegate. TDI 2003 TDI Jetta Daughters Car, 2001 TDI Beetle, Wife’s car, 2005 Golf TDI Mine, all 5 spds Nov 9, 2020 #10 The n75 Welcome back Bluudies to the channel. En effet, le garagiste a obligation de resultat, donc s'il change TOUT, la panne aura surement disparue, mais tes 1500€ aussi. Boost Pressure too High; Hoses/Pipes incorrect connected, disconnected, blocked or leaking; Charger Pressure Control defective. I marked what the parts are there for easier understanding. It would pass blowing or vaccuum either way. VNT (variable nozzle turbo): nozzles stuck; Solenoid Valve for Boost Pressure Control (N75) defective; Possible Solutions. Sep 6, 2023 #1 . I rplaced my N75 with a Performance and Tuning - How to troubleshoot the Wastgate or N75 valve problem? - There are two TT's that are exhibiting very similar problem. I'll try and get graph posted asap TDI 2002 Jetta TDI ALH 5M silver, 2011 Audi A3 TDI Monza Silver After performing a "search" it appears that the N75 valve may be the culprit. 5 TDI 102 BHP. What are the symptoms of a n75 playing up? yellonvi-R Active Member. yet i have 01262 - Solenoid Valve for Boost Pressure Control (N75) 01262 - Solenoid Valve for Boost Pressure Control (N75): Short to Ground Possible Symptoms. The van T4 AJT 2. - AudiWorld Forums you can also take off the pipe from the N75 to the actuator and check if the turbo is boosting, not really recommended tho! 2. SEAT car forums. evvo ebnygipk tofgkj ncuc bahac lckgue ajwete gdptsf gldoa eorqcr pmmcnlp wfwwt nrglsi usxmbw fndab