Please help. Turbo boost control position sensor low

[CKRATDI]

Hello everyone any help would be greatly appreciated. I have a 14 b7 passat ckra tdi dsg stage 2 malone, stock turbo replaced a year ago. Currently has 125k miles. First question my transmission fluid pressure low came on, is my fluid level low? I did a fluid change about 40k miles ago, it might be leaking I don't know.

Now the bigger question, I was driving and the glow plug light was flashing and the check engine light came on. Stopped engine and restarted, check engine light stayed on, it ran fine. This has happened 3 times, when the glow plug light is flashing it sounds like the turbo isn't working. The engine sounds quiet, i don't know how it drives because I've immediately pulled over to shut the car off. The first 2 times this happend all codes went away when I restarted the engine, this 3rd time the check engine light stayed on, it currently runs fine and the turbo sounds and spools fine but I'm sure if I go drive it this will all happen again as it's happened 3 times now in just a few days. I tried to check vaccum lines, I think they are okay but I'm not positive. I don't know if the boost control sensor is bad but this seems to be an intermittent problem not a constant one. I only have obd 11 pro and used that to scan the car, I don't want to drive the car and possibly damage the turbo, if anyone could shed some light that would help so much. I'm trying to figure out how I can determine the issue exactly because I don't have the extra money to throw alot of parts at it, or the time as this is my daily driver. Thank you all for your time. By the way I'm selling this car in the future its a 14 passat tdi se with 125k miles, I do have about 10k left on the loan, I've had it since 39k miles and have done religious maintenance every 5k on oil changes, dsg fluid every 35k, fuel filters every 15k. It's fully deleted no egr valve or egr cooler, no dpf. Straight pipe 3" turbo back, michelin cross climate 2 tires. Front bumper is cracked from hitting a coon, and rear door has a dent at the bottom other than that it's in great shape. All the mileage from 39k to 125k was 95 percent highway miles within the last 3 years. I live in Kansas so there's lots of highway driving. Let me know if interested

 

[oilhammer]

OBD works.... start there. Internet cannot help if you cannot at least post any DTCs.

 

[CKRATDI]

OBD works.... start there. Internet cannot help if you cannot at least post any DTCs.

P256400 is the code, it says on obd the code is turbo boost control position sensor(low) thats all I know at this point. Thank you for your reply

 

[CKRATDI]

OBD works.... start there. Internet cannot help if you cannot at least post any DTCs.

P256400 is the code. The code will only come on if I drive the car and begin to accelerate. When the car is idling the light won't come on and it runs perfect

 

[oilhammer]

18996/P2564/009572 - Ross-Tech Wiki

wiki.ross-tech.com

 

[pedroYUL]

Oh I battled that code in a BEW (PD)!
After making absolutely sure it wasn't a wiring issue and changing the actuator 2-3 times, I decided to replace the turbo et voila.

CKRA turbos are known to bite the dust.

 

[MrCypherr]

Yeah CKRA's are terrible when it comes to turbos.

Funny enough, I'm searching a P2563 code on my car (CJAA) , so sporadic though its crazy.

 

[CKRATDI]

18996/P2564/009572 - Ross-Tech Wiki

wiki.ross-tech.com

Thank you for your reply. I'm late getting back to this thread I don't get much time to work on this car. I don't see any wiring or vaccum line issues. I'm unsure if this is the boost solenoid or the boost position sensor. I'm also a bit confused what is what. Theres a sensor or something that has all the vaccum lines going into it, from the intake and then one going out to the boost solenoid actuator, is this called the boost control position sensor? Also my turbo is less than a year old

Oh I battled that code in a BEW (PD)!
After making absolutely sure it wasn't a wiring issue and changing the actuator 2-3 times, I decided to replace the turbo et voila.

CKRA turbos are known to bite the dust.

I'm unsure if it's the turbo. My turbo is still under warranty because i replaced it a year ago and there's another year warranty left. Im just hoping it's not the turbo because this would be the third one I've put on

 

[CKRATDI]

18996/P2564/009572 - Ross-Tech Wiki

wiki.ross-tech.com

It says your a vendor, do you sell parts? I'm trying to a find a coolant temp plug harness. Mine is broken. I'm also looking for a boost control position sensor because I don't know what else to replace first. My nearest vw dealership is almost 2 hours away. Also my coolant temp plug broke the other day, afterward I thought I had fixed a kinked vaccum line so I decided to test drive the car and it started flashing low oil pressure turn off engine. I'm kind of skeptical that my oil pressure is even low, I don't have a way to test it but it only happened after the coolant plug broke

 

[CKRATDI]

Oh I battled that code in a BEW (PD)!
After making absolutely sure it wasn't a wiring issue and changing the actuator 2-3 times, I decided to replace the turbo et voila.

CKRA turbos are known to bite the dust.

I agree, I've already replaced 2 turbos and the car only has 125k miles. I've owned it since 30k and religiously done fluid changes and oil changes every 5k with good oil and had nothing but reliability issues. If I ever owned a tdi again it'd probably be an ALH or something idk. I'm really considering a honda accord or Toyota camry that's naturally aspirated

 

[pedroYUL]

Thank you for your reply. I'm late getting back to this thread I don't get much time to work on this car. I don't see any wiring or vaccum line issues. I'm unsure if this is the boost solenoid or the boost position sensor. I'm also a bit confused what is what. Theres a sensor or something that has all the vaccum lines going into it, from the intake and then one going out to the boost solenoid actuator, is this called the boost control position sensor? Also my turbo is less than a year old

I'm unsure if it's the turbo. My turbo is still under warranty because i replaced it a year ago and there's another year warranty left. Im just hoping it's not the turbo because this would be the third one I've put on

If your turbo still has warranty, take it to that place. The position sensor is integral to the turbo actuator 03L198716M. The whole thing should be under warranty then, including the actuator.

 

[CKRATDI]

If your turbo still has warranty, take it to that place. The position sensor is integral to the turbo actuator 03L198716M. The whole thing should be under warranty then, including the actuator.

I bought the turbo online and installed myself so I will have to remove the turbo to send it back, I'm trying to avoid that if possible. What does the actuator looked like?

 

[pedroYUL]

Search part number 03L198716M, that's the actuator for your turbo.

 

[CKRATDI]

I apologize I meant to ask what the position sensor looks like

 

[pedroYUL]

Go to IDparts.com search for a turbo actuator for a 2000 whatever model, they will all have the ALH engine. Then search for a turbo actuator for a 2004 Jetta wagon, engine BEW.

The difference is obvious, ALH actuator has no electrical connector because it has no position sensor. The BEW has a black plastic back where the position sensor resides. Again the sensor is integral to the actuator.

 

[CKRATDI]

Thank you, I see what you mean. The actuator and sensor are the same part? Is it possible to remove and install this actuator without removing my whole turbo? I wouldn't know how to adjust the new one which makes me nervous because if I adjust it wrong the turbo could blow up. I have a warranty on this turbo but I'll have to remove the whole turbo and send it out, and they would have to know or figure out the actuator is bad otherwise they won't fix it. I don't know how they'll know the actuator is bad. They will replace the turbo for free but I have to do all the labor so I'd almost rather buy a new actuator for 200 or less and get it done quicker

 

[RSH]

When I had that code and same symptoms (flashing glow plug light, low power) I checked all the usual things like vacuum lines, turbo actuator diaphram vacuum, vacuum solenoid, etc. Took the car to Volkswagen, turbo was bad and replaced under warranty. It only took 3 days, dealer had to order the turbo. Car has been excellent since replacement.

 

[CKRATDI]

When I had that code and same symptoms (flashing glow plug light, low power) I checked all the usual things like vacuum lines, turbo actuator diaphram vacuum, vacuum solenoid, etc. Took the car to Volkswagen, turbo was bad and replaced under warranty. It only took 3 days, dealer had to order the turbo. Car has been excellent since replacement.

Does anyone have a way that I can test the actuator and sensor?

 

[bashik]

I recently replaced the actuator, I don’t remove the turbine, it’s inconvenient, but it’s possible
Do you have VCDS?You can check the condition of the actuator by creating a vacuum in it. the rod should come out and stay there as long as there is vacuum. my membrane was damaged and the vacuum did not hold well

 

[CKRATDI]

I only have obd 11. I am nervous to remove the actuator because I don't know how to adjust it when I re install it. If I have it out of spec I might ruin my turbo. Also there is a part on the driver's side, I'm trying to figure out what it's called. I tried uploading a pic but it won't work, it has one electrical plug and 3 vaccum lines going into it, one vaccum line from the intake and one going out to the actuator and I think the 3rd goes to the engine. I'm wondering what this part is called and if it could be causing an issue with my actuator?? When the engine was running and the flashing glow plug light came on and check engine light. The engine sounded different like the actuator had turned of the boost or done something. Thank you all for your replies, it's appreciated

 

[bashik]

There is n75 valve. This is the valve that controls the turbine actuator. it regulates the degree of vacuum supplied to the actuator.
I can find and write to you what the readings on the position sensor should be. and you will also need to make special keys with which you can unscrew the actuator
I believe that nothing will happen to your turbine even if you adjust the actuator incorrectly. The main thing is to initially place the top nut at the same distance as in your original one. Then adjust if necessary. first make sure that the actuator is sealed and holds vacuum

 

[CKRATDI]

There is n75 valve. This is the valve that controls the turbine actuator. it regulates the degree of vacuum supplied to the actuator.
I can find and write to you what the readings on the position sensor should be. and you will also need to make special keys with which you can unscrew the actuator
I believe that nothing will happen to your turbine even if you adjust the actuator incorrectly. The main thing is to initially place the top nut at the same distance as in your original one. Then adjust if necessary. first make sure that the actuator is sealed and holds vacuum

How do you go about making the keys? And is it possible the n75 valve could be what's causing me problems??

 

[bashik]

Tomorrow I'll show you a photo of the key. But I recommend that you first carry out diagnostics with a scanner

 

[CKRATDI]

Tomorrow I'll show you a photo of the key. But I recommend that you first carry out diagnostics with a scanner

Okay thank you for the help

 

[CKRATDI]

Okay thank you for the help

Tomorrow I'll show you a photo of the key. But I recommend that you first carry out diagnostics with a scanner

Also im.not sure what else I can diagnose with just obd 11

 

[bashik]

I've never had obd 11 but as far as I know it works great with VAG. You need to find a parameter that shows the voltage on the actuator position sensor. This is where diagnostics begin.

 

[CKRATDI]

I've never had obd 11 but as far as I know it works great with VAG. You need to find a parameter that shows the voltage on the actuator position sensor. This is where diagnostics begin.

I've never had obd 11 but as far as I know it works great with VAG. You need to find a parameter that shows the voltage on the actuator position sensor. This is where diagnostics begin.

It's showing voltage terminal 30 is 14.000v and normed load value 45.5% but thats all I'm really seeing