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[Solved] Daf XF 106 Engine Malfunction: P0046, P1727 Errors, VTG Turbocharger & EGR Issues

Demon2k9 44127 13
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  • #1 17608735
    Demon2k9
    Level 7  
    Posts: 38
    Rate: 24
    Board Language: polish
    Hello everyone, as in the subject I have a problem with dafem 106
    I see a motor fault after plugging in the computer displayed the following errors:
    P0046 VTG turbocharger actuator position error or internal error
    and EGR off, I will add that the first error could not be deleted
    that's why we replaced the driver with another functional dafa and the error went out but after driving a few kilometers the same again + a new error
    P1727 Serving of the VTG turbocharger Data is incorrect, interrupted or not correct
    I will add that the new driver was "programmed" for the new car
    Will someone be able to tell me what to do? thank you in advance like something ;)
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  • #2 17618170
    WloczykijMalaMi
    Level 15  
    Posts: 166
    Help: 15
    Rate: 140
    Board Language: polish
    Hi,

    how did you program the new driver? I understand that this is about VTG?

    Regards WiMM
  • #3 17618344
    serwis33
    Level 11  
    Posts: 30
    Help: 1
    Rate: 16
    Board Language: polish
    Hello, I have a question, who and what programmed the turbine controller? The programming process itself must be done with a DAF DAVIE computer and the turbine control module has two stages.
    initially the module is removed from the turbine, and then once again mounted on the turbine. Best regards service 33
  • #4 17619018
    Gacekpl111
    Level 1  
    Posts: 1
    Rate: 11
    Board Language: polish
    Hello.
    Under the topic I also have two errors from the VTG U1159 servo motor - VTG servomotor communication error can information frequency too low. U1835- VTG actuator communication error on can. And one from EGR-P1496- EGR turning off the engine since the appearance of errors began to work a little differently louder has a greater appetite for fuel within 35l per 100km and is much weaker I suspect that the fault lies on the side of the turbine geometry I don't know if the valve itself is damaged or maybe the aha beam I will add that the car was something around 6 months. Has anyone had a similar problem ??
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  • #5 17624175
    Demon2k9
    Level 7  
    Posts: 38
    Rate: 24
    Board Language: polish
    Hello buddy service 33 Exactly it was that VTG was "programmed" Daf Davie only that it was founded and then programmed right away and not like you write that in two stages
    So first it has to be dismantled, connected under the ankle and then programmed and then mounted to the actuator and programmed again ??

    Added after 5 [minutes]:

    Hello WloczykijMalaMi literally it is not programmed there is another function on the principle of matching the new VTG
  • #6 17624255
    WloczykijMalaMi
    Level 15  
    Posts: 166
    Help: 15
    Rate: 140
    Board Language: polish
    I know that, but after your speech I see that you did not know, hence my question.

    Programming the VTG motor alone will do nothing (this is only an executive element) if someone misplaces the ring in the turbine itself, and it can be done.

    Regards WiMM
  • #7 17625411
    serwis33
    Level 11  
    Posts: 30
    Help: 1
    Rate: 16
    Board Language: polish
    Hello
    Of course, programming alone will not help if the actuator is mounted incorrectly - it's probably understandable. When it comes to programming, there are actually 2 stages - during programming the program "runs by the hand" itself. I have somewhere VTG assembly instructions somewhere, if I find a toss. best regards
  • #8 17626497
    Demon2k9
    Level 7  
    Posts: 38
    Rate: 24
    Board Language: polish
    Hello, I know that in this topic I am green because until now I had to deal with dafas up to 105 and 106 is new to me in terms of defects
    I have a problem because I don't want to successfully initialize
    I will add that I found how to set the note in the turbine and even in the controller itself, but the error still throws me out
    The servomotor is 100 percent good, maybe it is not the mistake that I am unable to mount it correctly

    Added after 19 [minutes]:

    Gentlemen, tell me how many degrees the turbocharger cylinder should be set to 220 if I found or maybe 0
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    #9 17627187
    WloczykijMalaMi
    Level 15  
    Posts: 166
    Help: 15
    Rate: 140
    Board Language: polish
    After disassembly of the extension element, which is the VTG actuator, the VTG ring of the turbocharger is to be set to 100%, you do on the dismantled (electrically connected) VTG actuator its first calibration, you mount the VTG actuator on the turbine, you do the second calibration.

    The VTG actuator will set itself to its position. The most important thing is the turbine ring, which has a range from 0% to 100%.

    Regards WiMM
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  • #10 17627943
    Demon2k9
    Level 7  
    Posts: 38
    Rate: 24
    Board Language: polish
    Hello, that's how I set it up but I don't want to pass this calibration positively

    Added after 4 [minutes]:

    The computer throws me a calibration unsuccessful or the engine will be damaged? I emphasize that this is a utility with a guarantee that it is good
    best regards

    Added after 39 [minutes]:

    I will add that 1 stage will end in failure
    best regards
  • #11 17628028
    WloczykijMalaMi
    Level 15  
    Posts: 166
    Help: 15
    Rate: 140
    Board Language: polish
    If it does not pass the first stage, the actuator or the tester's fault is faulty.

    Unless you do everything right.

    Regards WiMM
  • #12 17634992
    Demon2k9
    Level 7  
    Posts: 38
    Rate: 24
    Board Language: polish
    Hello, I think the tester and my job are fine
    In this case, I need to get a new or checked vgt driver for now the car is on the road, if I understand the topic, let me know what and how
    Pozdr.
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  • #13 17635000
    WloczykijMalaMi
    Level 15  
    Posts: 166
    Help: 15
    Rate: 140
    Board Language: polish
    Beam checked? Because somehow I can't read.

    Regards WiMM
  • #14 17665271
    Demon2k9
    Level 7  
    Posts: 38
    Rate: 24
    Board Language: polish
    Hello, gentlemen, the topic was resolved, namely the vtg driver
    I did not check the harness because I always put in a tested device first and then if it does not improve, I look in the cables
    I know that the first time I did not install the checked driver although I had a guarantee that it is functional and it was difficult for me to assess whether it is broken or just I am doing something wrong because it was my first such adventure that 106 was not sure if my computer. he can handle it but as you can see both me and the tester did everything right
    Thanks to everyone for the hints
    best regards
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Topic summary

✨ The discussion revolves around engine malfunctions in a DAF XF 106, specifically errors P0046 and P1727 related to the VTG turbocharger and EGR system. The user reports persistent issues with the VTG actuator position and EGR functionality, despite replacing the driver and programming it. Various responses highlight the importance of proper programming using a DAF DAVIE computer, which involves a two-stage process for the VTG actuator. Participants share experiences with similar errors, emphasizing the need for correct installation and calibration of the turbocharger components. Ultimately, the user resolves the issue by replacing the VTG driver after confirming the harness was not faulty.
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FAQ

TL;DR: On DAF XF 106, the VTG ring runs 0–100%; "The most important thing is the turbine ring." Calibrate off‑turbine then on‑turbine with DAF DAVIE to fix P0046/P1727 and EGR‑off complaints. [Elektroda, WloczykijMalaMi, post #17627187]

Why it matters: For DAF XF 106 owners and workshop techs, this FAQ speeds VTG/EGR fault diagnosis and prevents costly mis‑calibration.

Quick Facts

What do P0046 and P1727 mean on a DAF XF 106 VTG turbo?

P0046 flags a VTG turbo actuator position or internal error. P1727 flags incorrect or interrupted VTG servicing data. In the thread, P0046 initially could not be erased. After a controller swap, P1727 appeared during driving. [Elektroda, Demon2k9, post #17608735]

How do I calibrate the VTG actuator with DAF DAVIE on an XF 106?

Use DAF DAVIE and perform calibration in two stages.
  1. Set the turbo VTG ring to 100% with the actuator removed and connect it electrically.
  2. Run the first calibration with the actuator off the turbine.
  3. Mount the actuator and run the second calibration. [Elektroda, WloczykijMalaMi, post #17627187]

Do I mount the actuator before the first calibration, or after?

Calibrate the actuator electrically while it is off the turbine. Mount it on the turbo only for the second calibration. "The most important thing is the turbine ring." Ensure the ring is at 100% during the first step. [Elektroda, WloczykijMalaMi, post #17627187]

Is programming the VTG motor alone enough to fix these faults?

No. "Programming the VTG motor alone will do nothing" if the turbine ring is misplaced. The motor is only an executive element. Correct ring positioning and two‑stage calibration are required for success. [Elektroda, WloczykijMalaMi, post #17624255]

What if the first calibration stage fails in DAVIE?

If the first stage fails, suspect the actuator or the tester. "If it does not pass the first stage, the actuator or the tester's fault is faulty." Confirm your procedure is correct, then substitute known‑good parts. [Elektroda, WloczykijMalaMi, post #17628028]

How should I position the VTG geometry—degrees like 220B0, or percentage?

Position by percentage, not degrees. Set the VTG ring to 100% before mounting the actuator. The ring’s range is 0% to 100%. DAVIE will set the actuator position during calibration. [Elektroda, WloczykijMalaMi, post #17627187]

Can incorrect mounting stop the VTG from calibrating even if I program it?

Yes. Programming will not help if you mount the actuator incorrectly. The module requires correct mechanical alignment and a two‑stage calibration. During programming, the software moves the mechanism through its range. [Elektroda, serwis33, post #17625411]

Im seeing U1159 and U1835 plus P1496what do they indicate and what symptoms occur?

U1159 and U1835 indicate CAN communication errors with the VTG servomotor or actuator. P1496 relates to EGR shutdown. Reported symptoms include louder engine, weaker pull, and fuel use near 35 l/100 km. The poster suspected VTG geometry or valve issues. [Elektroda, Gacekpl111, post #17619018]

Why is fuel consumption up and power down after these VTG/EGR errors?

The thread reports increased fuel use and reduced power when VTG comm or EGR faults appear. The engine sounded different and louder. Expect degraded performance until VTG control and EGR behavior are restored. [Elektroda, Gacekpl111, post #17619018]

What ultimately fixed the OPs P0046/P1727 case?

The solution was a faulty VTG driver/controller. Replacing the VTG controller resolved the persistent errors. The tester and procedure proved correct. The truck returned to service after the controller swap. [Elektroda, Demon2k9, post #17665271]

Which tool should I use to program or match a new VTG unit?

Use the DAF DAVIE diagnostic computer. The VTG control module requires two programming stages. First with the module removed, then with it mounted. This process aligns electronics and mechanics. [Elektroda, serwis33, post #17618344]

Should I check the wiring harness (beam) when chasing VTG CAN errors?

Yes, verify the wiring harness when communication faults persist. One contributor specifically asked whether the beam was checked. Inspecting the beam helps rule out CAN wiring issues before replacing parts. [Elektroda, WloczykijMalaMi, post #17635000]

I cant clear P0046; it returnswhat does that suggest in this scenario?

In this thread, a persistent P0046 ultimately pointed to the VTG controller. The controller swap resolved the underlying fault. Consider a known‑good controller if calibration fails repeatedly. [Elektroda, Demon2k9, post #17665271]

What does matching a new VTG mean in DAVIE?

The OP described it as a function to pair or match the new VTG. It is not free‑form programming. Use the DAVIE routine to integrate the replacement module. [Elektroda, Demon2k9, post #17624175]
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