Question about 2002 Volkswagen Jetta TDI

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Lack of turbo 2002 jetta tdi

I do have the same issue, i did try unplugging the maf sensor to no avail. any more ideas? Ii appears that the waste gate closes when accelerating and then turbo accuation ceases.

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Possible air flow meter problem get it code read bearing in mind not all code readers will spot it

Posted on Apr 25, 2009

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My 02 Jetta TDI. Check engine comes on & power reduced. Code reads "Turbo overboost." Changed 1) Wastegate actuator & vac hose. 2) MAF sensor. 3) N75 valve and all vac hoses. Same code after each.


what is code when you get the code or if know it online search just code and you will see multi sites for code most of them will tell causes and also how to repair

Jul 28, 2017 | 2002 Volkswagen Jetta TDI

1 Answer

VW Transporter, wastegate for turbo is seized, no power at all. can it be freed up, guy fixing it reckons it's abig job to get to it and if it can't be freed up it will be a waste of time?


I am told once seized it's toast. The waste gate and turbo are 1 piece and repair is $1,500. T.D.I.'s are cheap to drive until they have a mechancial problem.

As a protest I WILL NOT take my Jetta to a VW dealer. I go to local garage at half the price.

Oct 20, 2010 | 2001 Volkswagen Jetta TDI

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2003 Jetta TDI.. accelerating on Hwy, i feel like the turbo stops working and the vehicle accelerates only on naturally asperated power. engine light comes on. I can turn off the car and restart it, and...


I have the same car/year and problem. My turbo first acted up 50,000 km ago. I was told it was the waste gate linkage that was sticking. The Mechanic lubed it and work it back and worth with a air pressure device. Worked well for 40,000 km's but goes into limp mode almost every day.

I am told it could be waste gate actuator, air flow sensor, a vacuum leak, or one other thing. If you just bought this car it probably had the problem for a while and that's why the person who had it before dumped the car.

Worse case is the turbo with waste gate assembly attached come as one pice will have to be replaced for $1,500.00

Oct 20, 2010 | Volkswagen Jetta Cars & Trucks

1 Answer

Hi, MY VEHICLE (2002-JETTA 4 1.9TDi) HAS GOT NO POWER. On 5th gear, my accelarator is right down but vehicle does not exceed 120KMP. Alao 1st gear only lasts for like 1 second. What is the problem


have your car plugged in for fault codes, I suspect you have a turbo fault, maybe just an actuator or waste gate fault, but code reader will identify

Oct 05, 2010 | 2002 Volkswagen Jetta TDI

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I have a 2003 Volkswagon Jetta TDI with 210,000 kms. The turbo keeps shutting off when I exceed 3,000 RPMs in 4th gear. It will reset if I shut the car off then restart it. My mechanic says it is not...


Same problem, same year, my car has just passed 300,000km, it is your waste gate actuator (attached to the turbo), or air flow sensor, or maybe a vacuum leak, also some relay thing (not sure what my mechanic called it). If it is the waste gate it's est. repair is $1,500. Thanks VW.

Mine first failed at 240,000km I took it to a non VW garage and they lubed the waste gate linkage and worked it back and worth manually, this was good for 40,000km, but now it shuts off almost daily. The cars PC won't show a code (might show turbo limp mode). Your mechanic will have to check the things I mentioned, or you might get stuck having to go to VW for the repair. $$$$$$$$

Sep 28, 2010 | 2003 Volkswagen Jetta TDI

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How to change air filter on a 2002 jetta tdi


Air filter changement for 2002 VW Jetta 1.9 TDI:
1. Unplug MAF Connector.
2. Unscrew two Air Filter Housing screws - Phillips driver.
3. Screws do not come out fully. They remain loose in the Housing.
4. Remove Air Filter Housing. Lift up/towards. Rest on battery cover.
5. Remove old Air Filter.
6. Clean Filter Housing. Damp cloth.
7. Check upper half of cover too.
8. Insert new Air Filter. Ensure the edges are seated.
9. Reposition Filter Housing. Clips on leading edge down/in first.
10. Two screws (don't overtighten).
11. Reconnect MAF plug.


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Aug 30, 2010 | 2002 Volkswagen Jetta TDI

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Hello, I own a 2002 Jetta Diesel, lately its lacking power from time to time, seems like the boost from the turbo is delayed. Is that something I can fix or will I need a turbo?


you may be experiencing turbo lag due to a failing turbo or it could be that the waste gate on the turbo is sticking or that the vacuum line that operates the waste gate is frayed. check all connections going to and from the turbo check tightness check for leaks and check to see if the rubber hose has been compromised by the heat . hope this helps you.

Jun 18, 2010 | 2002 Volkswagen Jetta TDI

1 Answer

Turbo problem...dealer replaced valve...still


If you have a problem that isn't caused by something obvious, you need a Ross tech VCDS cable. This is a laptop computer diagnostic cable to talk to the car's computer. Without it you cannot do the more advanced tests.
Note about generations - some generations have similar engines: Mk3= 1996-1997 3rd generation Passat TDI or 1996-1999 3rd gen Jetta TDI Mk4= 1998-2006 New Beetle, 1999-2005 Jetta, 1999-2006 Golf, 2004-2005 Passat TDI Mk5= 2005.5-2010 Jetta TDI Mk6= 2010+ Golf TDI
Remember, an engine needs fuel, air, and compression to run. Low power is related to a lack of one of these or a sensor problem making the computer thinking there's a lack of these. Any sensor problem could also be caused by a bad ground or broken/chaffed wire so also check every section of the wiring of the suspect sensor for breaks.
Bad MAF sensor - very likely cause on the mk4 TDI. Not common on the mk3 TDI (1996-1999 Jetta/Passat). Early mk4 MAFs failed often.Error codes normally do not show up with a faulty MAF since the signal degrades instead of going out completely. Through VCDS, checking MAF actual vs. specified at idle, high rpm, and high load will quickly show a bad MAF or other problem causing a low MAF reading.
Clogged intake manifold - carbon buildup chokes the intake manifold, starving the engine of air. Only ultra low sulfur diesel is sold in North America now so there should be much less buildup in the future. Always use good quality synthetic engine oil on your TDI..
Anti shudder valve shut or almost shut (does not apply to mk3 TDI, more for mk4 TDI) - there is a spring loaded valve right before the intake manifold. Newer TDI use an electronic valve and are not as susceptible to sticking. If there is excess carbon buildup, it could shut in a partially closed position.
Clogged snowscreen/air filter - a clogged air filter will starve the engine of air. A clogged snowscreen (large debris air pre-filter) shouldn't block off all air unless the aux-intake flap is also clogged.
Clogged fuel filter - change interval is 20,000 miles but biodiesel use (cleans out old buildup) or bad fuel could clog it early, resulting in fuel starvation. Algae or bacterial growth in the fuel tank could also clog the lines.
Boost leak - a cracked hose or loose connector lets measured air out. No air or major leaks = poor engine running or stuttering. A visual inspection may not reveal all the possible or hard to see spots where leaks can form.
Hose inside ECU (mk3 TDI only, does not apply to mk4 or newer TDI) - this hose leaks and normally sets a check engine light,
Vacuum lines to/from turbo and n75 solenoid - these dry out over time and crack or can rub through. It's possible they are clogged. The n75 solenoid controls the turbo wastegate or VNT vanes with either vacuum or pressure. b4 Passat - on firewall above coolant reservoir, a3 Jetta - on pass side near air box, a4 Jetta/Golf - on firewall above brake fluid reservoir.
Problem with the n75 solenoid, VNT actuator, VNT vanes, or vacuum lines. You should have already checked the vacuum lines, the below test will inspect the entire system. Start the engine and through VCDS, click on "engine"-->"measuring blocks"-->hit "up" until you reach "group 11". Compare Specified vs. Actual MAP. This compares what's actually happening and being observed from the boost sensor (barring a faulty sensor/plug/wire) to boost the computer is requesting (what should be happening). They should be relatively close. If they are far off this normally results in limp mode but it could also be contributing to the problem. If you have a mk3 you have a conventional turbo but you can still use this test to check the n75 solenoid, the wastegate, and vac lines. However, wastegates are much less susceptible to sticking vs. VNT vanes. The videos below show how it works. The lever on the outside is welded to a lever inside the turbo housing. This is how it moves the VNT vanes. See the below videos to see how smoothly and free the lever should move. It should not stick or bind at all. Vacuum is being applied to the can, not pressure.
If the test shows poor response or no response at all, it could be sticky VNT vanes/actuator (mk4 and newer TDI only), The vanes or actuator can stick or fail to function, the lever should move freely.
If the actuator is fine, also check the n75 solenoid and vac lines. The n75 solenoid controls vacuum or boost to the vacuum line going to the turbo wastegate/VNT actuator. To test, apply voltage to the solenoid or swap with a known good unit. If you have a mk4 TDI, you can swap it with the EGR solenoid to test. Also check the plug for corrosion and the wiring harness for chaffing. If those are good, disconnect the VNT actuator rod and move the vanes by hand. If the vanes are stuck then remove the turbo and clean the inside of the exhaust housing to free the stuck vanes.
Faulty injection pump's fuel injection quantity adjuster - these are occasionally set wrong from the factory or after seal replacement. It's also possible the fuel pump's internal quantity adjuster is faulty. Applies to 1996-2003 TDI only or TDI that use a Bosch VE injection pump (not pumpe duse or common rail). Injection quantity should be 3-5 at idle and up to 36-38 at full throttle.




Feb 01, 2010 | 2004 Volkswagen Jetta

1 Answer

Fault code p0245 puegoet 406 turbo fault


My book shows that P0245 is the super/turbo charger solenoid "A" voltage is low.

Sep 29, 2009 | 2005 Peugeot 405

2 Answers

2002 volkswagon jetta turbo diesel need to know what this trouble code means p3130


you have a bad mass air flow sensor. unplug the mass air flow sensor, the car will run normal if the sensor is bad

Jul 26, 2008 | 2002 Volkswagen Jetta TDI

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