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Scania R420 Euro 5 HPI 2012 - Adblue EMS 4106 - Communication with NOx sensor

pawelek90 11001 8
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Treść zostaÅ‚a przetÅ‚umaczona polish » english Zobacz oryginalnÄ… wersjÄ™ tematu
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  • #1 16258480
    pawelek90
    Level 2  
    Hello.
    The car diagnosed shows the error EMS 4106 - Communication with NOx sensor. The cables between the NOx sensor and the SCR control unit pass through, the SCR sensor receives power. What could be causing this error? Defective NOx sensor? The system doses urea and passes the system operation test in SDP3. SDP3 indicates that in the absence of the simultaneous presence of EMS code 4108, the fault is in the line "NOx sensor" - "SCR control unit" and not in the line "SCR control unit" - "engine control unit". Please help.
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  • #2 16259540
    krisek66
    Level 12  
    Hello ... Warm up the car and check in sdp3 logging signal ppm reading, as it will be 0 all the time the sensor to be replaced
  • #3 16720923
    324
    Level 2  
    +15 scr relay, passenger window

    Added after 53 [seconds]:

    100%
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  • #4 16721145
    saron22
    Trucks specialist  
    324 wrote:
    +15 scr relay, passenger window

    Added after 53 [seconds]:

    100%


    I would bet more on damaged NOx ...
  • #5 16721438
    324
    Level 2  
    bad relay broken sometimes! gazi +15
    EMS 4108
  • #6 20946854
    gbolak
    Level 10  

    Hello, could you tell me where this relay and +15 are?
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  • #7 20948355
    324
    Level 2  

    Relay for raising and lowering the window in the passenger door provides a contact current of +15 to the door and SCR. In case of overheating of the relay, there is a power failure and it reports an error.

    Added after 4 [minutes]:

    I hope you understood! I use a translator from Serbian to Polish 😅
  • #8 20948702
    szaman108
    Level 31  
    Hello
    If this relay fails and there are two, like RP1 and RP2 next to each other, then you have a disco on the board and it is more colorful than at a school disco in the 90s. If one of these relays is damaged, you have many more errors than the others systems and not just a problem with nox!!! Is the nox sensor original, or do you smell rice?
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  • #9 20948709
    gbolak
    Level 10  
    >>20948355
    Thank you for the quick reply. All clear.
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Topic summary

The discussion revolves around a Scania R420 Euro 5 HPI 2012 experiencing an EMS 4106 error, indicating a communication issue with the NOx sensor. Users suggest checking the NOx sensor's signal readings in SDP3, as a reading of 0 may indicate the sensor needs replacement. There are also mentions of potential issues with relays affecting the SCR system, particularly if they are damaged, which could lead to multiple error codes. The original condition of the NOx sensor is questioned, with a suggestion to verify if it is an original part or a cheaper alternative.
Summary generated by the language model.
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