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MAN TGX 440 - TCU Gearbox Error 00191-08: Troubleshooting & Assistance

mikiman440 26136 8
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  • #1 17073575
    mikiman440
    Level 7  
    hello I have a problem error TCU 00191-08 will you help?
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  • #2 17073685
    darfur5
    Level 35  
    Gearbox output speed; distorted signal. Why are you setting up a new topic in the previous post, you asked the same.
  • #3 17073736
    mikiman440
    Level 7  
    what does it mean what should i do?
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  • Helpful post
    #4 17075594
    darfur5
    Level 35  
    This is an error of the RPM sensor at the box output (tacho). So the speed at the entrance is different from the speed at the exit from the box. The sensor, its wiring,
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  • #5 17076001
    mikiman440
    Level 7  
    and tell me, I changed the egr in the mana because the coolant was taking the liquid now less, but it will also take something, there is no leakage, but every day sir the orange bubble appears and the thermometer stinks with exhaust fumes as if it burned out, but every day even 2 times a day after 30km goes out

    Added after 5 [minutes]:

    MAN TGX 440 - TCU Gearbox Error 00191-08: Troubleshooting & Assistance

    Added after 1 [minutes]:

    or I have something like that in tga 400 d20 I do not know what if the liquid is bad, because the bubbles are gently and the plug is unscrewed, the pressure is done sle the car has power and goes normally
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  • #6 17076147
    Chavez
    Level 25  
    mikiman440 wrote:
    or I have something like that in tga 400 d20 I do not know what if the liquid is bad, because the bubbles are gently and the plug is unscrewed, the pressure is done sle the car has power and goes normally


    If you do not smell the exhaust gas, there may be bubbles from the compressor.
  • #7 17077926
    darfur5
    Level 35  
    A few questions; Does the car have a retarder. Did you change the coolant, if so, what was the reason. Was it done with EGR. Does this goo in the tank have any smell or is it greasy, can you feel some "sand" under your fingers.
  • #8 17080172
    mikiman440
    Level 7  
    hello gentlemen, this goo is such a frothy smell of egr fluid not touched a year ago made head the fluid was replaced I do not know what retarder does not have a tank stuck with this muck

    Added after 3 [minutes]:

    MAN TGX 440 - TCU Gearbox Error 00191-08: Troubleshooting & Assistance
  • #9 17082916
    forestt
    Level 15  
    Hello, maybe a poor quality coolant?
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Topic summary

The discussion revolves around a TCU gearbox error code 00191-08 encountered in a MAN TGX 440 vehicle. The error indicates a distorted signal from the gearbox output speed sensor, suggesting a discrepancy between the input and output speeds. Users discuss potential causes, including issues with the RPM sensor and its wiring. Additional concerns arise regarding coolant loss and the presence of bubbles in the coolant system, which may indicate a problem with the EGR system or poor-quality coolant. Suggestions include checking for exhaust gas smells and the quality of the coolant used.
Summary generated by the language model.
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