VW

Have Volkswagen Questions? Ask an Expert Now.

Ask an Expert,
Get an Answer ASAP!

My name is ***** *****. I have the turbocharger boost

Customer Question
My name is *****...

My name is ***** *****. I have the turbocharger boost control position sensor circuit (a) low, fault code. I have checked the operation of the vane actuator with a vacuum pump, it holds a vacuum and operates the actuator between approx. 5-20 inHg. The wiring seems to be ok with what I can see. I need to know a few things. The vacuum at idle is 28.5 inhg. the actuator pulls to the stop and stays there at idle(as soon as you start the engine) Normal? I need to know electrical checks(ohmage) to see if the electrical side has failed on the VNT smart actuator. Any simple tests. Long story short I feel electrical is my issue unless the vacuum should be changing but isn't, which I have only checked at idle. Thinkin' about T-ing into the vacuum feed to the VNT and hooking that up to a gauge..go driving and see if the vacuum changes values.

Mechanic's Assistant: Thanks. Can you give me any more details about your issue?

2004 Jetta TDI, BEW. CEL with code 18996.

Submitted: 2 years ago.Category: VW
Show More
Show Less
Ask Your Own VW Question
Answered in 2 hours by:
3/3/2016
VW Mechanic: Kevin, VW Mechanic replied 2 years ago
Kevin
Kevin, VW Mechanic
Category: VW
Satisfied Customers: 3,110
Experience: Diagnostic technician at vw/ audi specialist
Verified

Hi I'm Kevin do you have a scan tool that reads live data?

Ask Your Own VW Question
Customer reply replied 2 years ago
No. Freeze frame. CEL came on after car start not while driving. I need to check voltages/ohms and vacuum, I know. Disconnected vacuum off of N75 and had definite lag in accceleration(no turbo assist).
Customer reply replied 2 years ago
I wonder if you disconnect the plug from a good VNT smart actuator if you would get the same code or something in the ballpark
VW Mechanic: Kevin, VW Mechanic replied 2 years ago

I will opt out i would need to know live values to assist

Ask Your Own VW Question
VW Mechanic: Wolfgang, VW Master Technician replied 2 years ago
Wolfgang
Wolfgang, VW Master Technician
Category: VW
Satisfied Customers: 5,250
Experience: Senior VW Master Tech 15 yrs
Verified

Hello I'm Wolfgang. I do need a vin# ***** to get repair info. Thanks

Ask Your Own VW Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a vw mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask vwnewton Your Own Question
vwnewton
vwnewton
vwnewton, VW Owner,ASE Master and L1 Advanced
Category: VW
Satisfied Customers: 307
307 Satisfied Customers
Experience: 25 years of VW obsession turned into a job, last 15 years as a VW Tech.

vwnewton is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry.

Stephanie PElm City, NC

used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future.

David L.Richmond, TX

9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much.

PhilMarysville, CA

Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible.

CharlesWalnut Creek, CA

As a single woman, I really appreciate an excellent and affordable opinion.
Thank you Geordie, I will not hesitate to contact justanswer in the future!

SueCharleston, WV

Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff.

JimCastleberry, FL

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

< Previous | Next >

Meet the Experts:

vwnewton

vwnewton

VW Owner,ASE Master and L1 Advanced

307 satisfied customers

25 years of VW obsession turned into a job, last 15 years as a VW Tech.

VWDoc

VWDoc

Independent VW Shop owner

1,764 satisfied customers

20 years of experience working with VW's. Independent European shop owner and technician.

Martin

Martin

auto electrical

804 satisfied customers

South African Trade Diploma in Auto Electrical

Matt

Matt

Engineer

708 satisfied customers

Mechanical Engineer with 20 years experience in the auto industry, 8 yrs in formula 1 engine testing

Tim&#039;s Auto Repair

Tim's Auto Repair

mechanic

484 satisfied customers

Have owned a repair shop for 25 yrs.

Tim Mohr

Tim Mohr

ASE MASTER TECH

419 satisfied customers

30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL

Chris(aka-Moose)

Chris(aka-Moose)

VW Technician

286 satisfied customers

16 years of experience

< Previous | Next >

Related VW Questions
Code p0101 and p0299 with black smoke and shakes when
code p0101 and p0299 with black smoke and shakes when ideling after driving and come to a stop sign. … read more
camerontech
camerontech
20 year experience diagnostic technician
class a
673 satisfied customers
The turbo is leaking oil out of the plastic pipe that runs
The turbo is leaking oil out of the plastic pipe that runs from the turbocharger down to just in front of the right front tire. That plastic pipe is broken. It's a 2004 Jetta tdi gls. … read more
gomi_otaku
gomi_otaku
Auto Technician (dealership)
Vocational, Technical or Trade Scho
2,229 satisfied customers
Im thinking that this issue MAY be a timing issue. Is it
Im thinking that this issue MAY be a timing issue. Is it POSSIBLE that the injection pump timing or something is off? Diesel is NOT my area of expertise, but I have seen similar situations in GAS engi… read more
Wolfgang
Wolfgang
VW Master Technician
5,250 satisfied customers
I installed a new garrett turbo in 2001 Jetta TDI. I am now
I installed a new garrett turbo in 2001 Jetta TDI. I am now getting no boost at all from the turbo. I cleaned the egr and intake manifold while it was taken apart, I installed new vaccuum line to the … read more
Dan
Dan
Dealership Technician
Associate Degree
2,143 satisfied customers
2004 Vw jetta TDI looses boost. Aftter on off ignition there
2004 Vw jetta TDI looses boost. Aftter on off ignition there is boost at first or at least some but at higher rpms like 3500 it loses all boost and goes into limp mode. restart and same thing here are… read more
gomi_otaku
gomi_otaku
Auto Technician (dealership)
Vocational, Technical or Trade Scho
2,229 satisfied customers
Volkswagen Jetta 2.0T: My 2009 tdi jetta has a p0299 pending
My 2009 tdi jetta has a p0299 pending code, the glow plug light flashes and it goes into limp mode. Otherwise my car runs sluggish before it hits limp mode. There is oil present on the valve cover. Do… read more
gomi_otaku
gomi_otaku
Auto Technician (dealership)
Vocational, Technical or Trade Scho
2,229 satisfied customers
Volkswagen 2009: My 2009 jetta sportwagon has 45K miles, and
My 2009 jetta sportwagon has 45K miles, and prior to this issue, ran like a top. Tried to start my car when the temp was 0 degrees, and it wouldn't start. I placed the battery charger on the battery, … read more
Wolfgang
Wolfgang
VW Master Technician
5,250 satisfied customers
Volkswagen Jetta: PO 234 code - vw jetta tdi 2003 - could this
PO 234 code - vw jetta tdi 2003 - could this be caused by dirty oil - I've always changed oil at 10,000 miles. Have switched to Rotella 5w40 - should I go back to Mobil 1 5w40?… read more
iauto8
iauto8
Auto Technician
Vocational, Technical or Trade Scho
59 satisfied customers
wagon: I do to stop blowing turbos every 80k..my 04..intake impeller
What can I do to stop blowing turbo's every 80k on my 04 Jetta Wagon TDI. The last time it appeared that the intake impeller fractured causing the shaft to snap etc. There was absolutely no sign of co… read more
Matt
Matt
Engineer
Bachelor's Degree
708 satisfied customers
VW Jetta TDI: Boost..position sensor..spec is between 20 to 30 ohms
Hi! I'm working on a VW Jetta TDI 2006 with a bew engine but code definition working only with BRM engine. I,m always getting code P2564(18996) Turbocharger Boost control position sensor circuit low. … read more
Wolfgang
Wolfgang
VW Master Technician
5,250 satisfied customers
2003 Jetta TDI: engine light..Turbo charger..solenoid might be faulty
The engine light in my 2003 Jetta TDI is on. The code is P0299 indicating Turbo charger underboost condition. What sensor or solenoid might be faulty and where is it located. Changed air filter 2 mont… read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
1997 VW Jetta TDI: well maintained..drops..limp mode..throttle
I own a well maintained 1997 VW Jetta TDI with 217k. Frequently drops into limp mode when climbing long grades at moderate throttle to maintain speed. Cycling keyswitch will return power to normal unt… read more
Wolfgang
Wolfgang
VW Master Technician
5,250 satisfied customers
2005 VW Transporter: TDI..60 mph..acceleration is..faults
Loss of power with a 2005 VW Transporter T30 104 TDI Campervan with speed limited to approximately 60 mph and 2000rpm, acceleration is virtually non existent.. This occurs only on long journeys ( grea… read more
HondaPlatinum
HondaPlatinum
High School or GED
148 satisfied customers
polo tdi 2004 1400.It cuts out on 3000rpm in 3rd gear..runs good
I have a polo tdi 2004 1400.It cuts out on 3000rpm in 3rd gear and then has no power.If you switch of and restart it runs good again.What can it be… read more
gomi_otaku
gomi_otaku
Auto Technician (dealership)
Vocational, Technical or Trade Scho
2,229 satisfied customers
2001 golf 1.9 tdi, during exceleration it seems as if the turbo
2001 golf 1.9 tdi, during exceleration it seems as if the turbo is not working, i can hear the whistle of the turbo from time to time but most of the time i dont hear it . during exceleration it is mo… read more
dan
dan
Associate Degree
420 satisfied customers
Diagnosed as needing replacement vacuum actuator for turbo.
Diagnosed as needing replacement vacuum actuator for turbo. Nobody sells the part. What to do???… read more
Rick VDUB
Rick VDUB
VW/Audi mechanic
Vocational, Technical or Trade Scho
52 satisfied customers
VW Golf TDI: engine code..Limp..front wheels as the turbo kicks in
Hi There, I recently purchased a 51 plate VW Golf TDI varient, 110 BHP engine code ASV. I have a problem with the engine loosing power, going into "Limp" mode, but am able to correct this by turning o… read more
Rick VDUB
Rick VDUB
VW/Audi mechanic
Vocational, Technical or Trade Scho
52 satisfied customers
2003 Jetta Tdi: with 51 K miles..get a japanese Gas car
I am looking @ a 2003 Jetta Tdi with 51 K miles. Is this a good reliable car to buy for about 15K or should I avoid it and go get a Japanese Gas car like a Toyata or a Honda… read more
Max
Max
VW lead technician
High School or GED
130 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x