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MAN TGX 440 - Error EDC 03819-04, DIAG 02061-08, INST 08135-04

Fast_international 49806 21
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What do the MAN TGX fault codes EDC 03819-04, DIAG 02061-08 and INST 08135-04 mean, and where should I look for the AdBlue fault?

These codes point to a CAN-bus communication problem in the AdBlue/exhaust aftertreatment system, not just a simple level warning. EDC 03819-04 means CAN side 3 has no signal, DIAG 02061-08 means the exhaust control unit’s CAN signal is distorted, and INST 08135-04 / SPN 8135 means the AdBlue tank fill-level information is missing at the instrument cluster [#15393681][#20902226] The most likely cause is damaged, disconnected, or corroded wiring/connectors on the CAN line between the exhaust aftertreatment control unit, AdBlue tank, pump, NOx sensor, and dash cluster [#15432747][#15465095] Several replies advise checking the orange connector near the right tank, the pump plug, and the harness for rubbing or corrosion, then unplugging and reconnecting the connectors to see if the fault disappears [#15434393][#15400458][#16388119] The official check list also says to read the full vehicle memory with MAN-cats, verify software compatibility, and test the CAN wires for shorts to power, ground, or between CAN H/L before repairing or replacing cables and plugs [#20902226]
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  • #1 15389917
    Fast_international
    Level 12  
    Posts: 169
    Help: 6
    Rate: 86
    Hello,

    I need error descriptions as above. In addition, there is information about the malfunction of the AdBlue system and information in the GDK / PDF FNr diagnostics. I am surprised that there is no error in GDK / PDF, but I have not driven the vehicle yet and I do not know if it cuts off the power or not. After turning off the vehicle and restarting the bugs, they are silent, only after a while they show up.

    I would like to add that the errors caught fire after about 50 hours of downtime and turning the ignition switch, I wanted the car to burn out so that the battery would charge a little (I'm on the road) and they popped up right away ...

    Thank you very much for the error descriptions and any hint.

    I would like to add that the AdBlue level indicator is at zero and every now and then it will jump up and down again ...
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  • #2 15393084
    buttiewtz82
    Level 11  
    Posts: 10
    Rate: 33
    Good morning.
    If it is possible, I will stick to the topic. Errors similar to the above EDC 03819-08, INSP 08135-04. I only found a problem with Ad Blue.
    Can anyone help?
  • #3 15393681
    darfur5
    Level 35  
    Posts: 2110
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    EDC 03819-04 - CAN side 3 - no signal

    DIAG 02061-08 - CAN signal from the exhaust from the control unit - distorted signal
    INST 08135-04 - AdBlue tank information error Filling level - no signal
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  • #4 15400458
    mateuszyo
    Level 11  
    Posts: 121
    Help: 1
    Rate: 100
    You have a problem with the beam rubbing somewhere and therefore the sensor works once and then fails. Trace the electrical wiring starting with the adblue tank
  • #5 15431397
    jacek3351
    Level 2  
    Posts: 3
    Rate: 3
    I hook up I have the same problem does someone know where it can not connect ???
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  • #6 15432747
    darfur5
    Level 35  
    Posts: 2110
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    EDC 03819 CAN 3 module (CAN additional exhaust gas treatment Master-Slave). - The shutdown status by the CAN3 module In the case of EDC7 C32 Master-Slave with MAN AdBlue A-CAN (CAN additional exhaust gas treatment), it is connected to pin 25 (wire 191) and pin 32 (wire 192) of the Master controller, and OBD -CAN to pin 25 (wire 185) and pin 32 (wire 186) of the Slave controller CAN connection with OBD-DCU15 plug socket, AdBlue fill sensor and NOx sensor (version P362V25 with joint CAN exhaust gas and OBD-CAN) pin plus B25 pin minus B32 set value 115-125 ohm.
  • #7 15434393
    kakibara
    Level 35  
    Posts: 2373
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    And it is better to write to check the orange plug, which is at the height of the right tank, closer to the frame, if there is no problem there, with voltage - green pins, maybe it is worth replacing the adblue tank fill sensor from the bottom?
    Unplugging and reconnecting the plug - the cube from the adblue pump also works wonders - it has been tested many times - which does not mean that the entire plug can be replaced, as well as the wiring. Good luck.
  • #8 15434738
    darfur5
    Level 35  
    Posts: 2110
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    Rate: 1695
    It was a provocation :D
  • #9 15434898
    kakibara
    Level 35  
    Posts: 2373
    Help: 201
    Rate: 1275
    Why, you need to help because your friend will leave a lot of money on the site, and who will bring us potatoes and chicken breasts cheaply?
  • #10 15435237
    jacek3351
    Level 2  
    Posts: 3
    Rate: 3
    the dragon and the plug are ok, I unplugged another tank and nothing else. there must be a short circuit somewhere because the clock is blinking, I will continue to look for a service
  • #11 15435713
    darfur5
    Level 35  
    Posts: 2110
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    Rate: 1695
    Sorry! I did not mean any maliciousness, this is a detailed description of the EDC error, the colleague will be able to check the wires with a meter by the cable numbers and where the problem is in the harness, no one can indicate 100 percent, sometimes an ordinary accident helps, and sometimes a good one eye.
  • #12 15436293
    kakibara
    Level 35  
    Posts: 2373
    Help: 201
    Rate: 1275
    no need to apologize, I understand everything, description is ok, I am also without any malice,
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  • #13 15465095
    svavecone
    Level 25  
    Posts: 586
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    When measuring the wires, we must remember, of course, to disconnect all components on the CAN bus, i.e. ... NoX, EDC, Adblue tank and Adblue pump / controller :) .
    A sensitive point for corrosion and the lack of connections are the bridges for the CAN bus and the power supply of these components, which are thoughtlessly placed in the bundle, in the frame above the plug of the NoX sensor. Correct me if I confuse the locations.
    Before wiring measurements, you can start by disconnecting the NoX sensor, as it itself may interfere with the CAN.
  • #14 15586896
    Fast_international
    Level 12  
    Posts: 169
    Help: 6
    Rate: 86
    Hello,

    I'm sorry that I was silent for so long, but I had a bit of a headache.

    So yes, in my case the AdBlue fluid level sensor needs to be replaced. But, that's right, there is BUT ... The mechanic said that we will drop some liquid from the tank, halfway down, and we'll see what happens. After dropping the liquid from the tank to 40 liters, i.e. halfway, and after restarting the system, everything works, AdBlue is consuming normally, no errors.

    I suspect that when I pour more than half, it causes mistakes again, but for now, I will not check it. In 2 weeks, when I come back to Poland, I will pour it under the cork and see what will happen.

    Despite this combination, I have a sensor to replace 90%, apparently when the float rises higher, something fails ...
  • #15 15587925
    kakibara
    Level 35  
    Posts: 2373
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    In my opinion, your mechanic is wrong, because the sensor is a sonar and it either works or not, and so if you checked the entire beam and you are sure that it is ok - check what the controller sees in the pump, i.e. how many liters is the tank programmed - at my company after such games, with the replacement of 3 sensors with a beam opened 5 times and a change of the tank, I suggested to my colleague a preview of the parameters - he was more astonished when I rode up from the side with the other man, I unplugged the orange plug - the one behind the venting of the right tank (diesel) and connected to another indicator showed a full tank. disconnect the plug from the pump and reconnect.
  • #16 15877567
    wit-trans
    Level 11  
    Posts: 73
    Rate: 68
    I have the same problem, EDC 03819, a colleague connected the computer. MANA, there is no CAN signal, he does not see any element from the adblue system, he connected a new adblue level sensor, the same, says that the can signal cable is worn somewhere, but where to look? ripping the entire bundle defeat, maybe someone knows the cable number, yesterday I checked the Nox sensor harness, adblu pumps, they look ok (no cable "came out" from the conduit) I found 1 frayed pink cable 40 134 - it was in a thick conduit in the bundle on the right side the cabin that goes from the cabin, next to the radiator into the frame and on, the cable is soldered, the heat-shrinkable shirt, but still the same. It turns out that something else has been released somewhere, but I do not know where to look. Maybe you can suggest something.
  • #17 16388119
    Fast_international
    Level 12  
    Posts: 169
    Help: 6
    Rate: 86
    Hello,

    Gentlemen, after cutting the plug at the AdBlue tank, everything returned to normal.

    Regards :)
  • #18 16388175
    kakibara
    Level 35  
    Posts: 2373
    Help: 201
    Rate: 1275
    Gentlemen, after cutting the plug at the AdBlue tank, everything returned to normal.
    - I will never believe it.
  • #19 16390071
    Fast_international
    Level 12  
    Posts: 169
    Help: 6
    Rate: 86
    Fast_international wrote:
    Hello,

    Gentlemen, after cutting the plug at the AdBlue tank, everything returned to normal.

    Regards :)


    Sorry, I meant after unplugging and reattaching, not cutting out.

    Sorry for the typo
  • #20 20899536
    dymianek
    Level 11  
    Posts: 16
    Rate: 3
    Refers to error ecc3819, Man TGX D26, AdBlue worked until the end of normal, the sensor shows the level of AdBlue, some voltage is on the orange plug. In desperation, I thought I would gain some time to repair, I connected the AdBlue modulator to cables 191 and 192 in the box under the hood by the driver's legs. Unfortunately, it just doesn't throw the error about exhaust aftertreatment, but I continue to have a problem with CAN and error 3819. electrical and engine failure on the dashboard.
    Does this somehow narrow down the search for a cable break? I've looked externally through the cable junctions, I haven't noticed anything, and overall I don't know how to go about it. The cable junctions are not split, you have to cut it all? Any good advice
    Thanks in advance for the hints.

    At the same m/w time a trailer ABS error popped up, I thought it was a different tale trailer fault but it's a tractor ebs connection error with can ! Autocom error 249-modul ebs does not send can signal , 198- speed front axle no information , 199- can bus signal village, 91- can signal EBC1 , so it is falling apart all over.
  • #22 20902226
    ROKADI

    Level 22  
    Posts: 388
    Help: 43
    Rate: 191
    SPN 8135 CAN data bus message from exhaust
    cleaning system control device
    Monitoring strategy
    Monitoring CAN data bus message from exhaust aftertreatment system control device
    Customer reception/description of symptoms
    - Information from the instrument cluster is available on a limited basis
    Failure Mode Identification (FMI)
    FMI 4 No signal
    Display indication
    Priority 5 Text
    indication
    ---.
    Control device conditions
    Setting conditions
    The A407 instrument cluster does not receive the CAN data bus message from the control device of the
    exhaust gas cleaning system
    Resetting conditions
    The CAN data bus message is received and is reliable
    Cause
    Possible causes
    ► The electrical wires and plug connectors of the CAN data bus between the control device of the
    exhaust gas cleaning system and the A407 instrument cluster are damaged or disconnected
    Checks
    Possible check steps
    ► Turn on the ignition, read the diagnostic memory of the entire vehicle using the MAN-cats application and
    check the entries in the diagnostic memory
    Check the software version and compatibility of the exhaust aftertreatment control device and
    the A407 instrument cluster
    Check the electrical wires and CAN data bus plug connectors between the
    exhaust aftertreatment control device and the A407 instrument cluster for a short circuit to the
    positive power terminal, to ground and between the High/Low wires, as well as for damage,
    breakage, transition resistance, change in cross section, corrosion, correct connection and loose
    contacts
    SPN_8135_CAN-Datenbusbotschaft von Steuergerät
    Abgasnachbehandlung_INS-Cluster-CONTI : 2022-01-26 : 2/2
    Measure
    Possible remedy
    ► Repair or replace electrical cables and plug connectors as necessary
    Note
    Additional information/advice
    ► Note SPN-related documents and technical information, if available
    ► Control device monitoring functions have detected a missing CAN data bus message.
    The cause is probably on the side of the CAN bus message transmitter or in the wiring
    of the vehicle. Therefore, read the diagnostic memory of the entire vehicle and check the entries in the
    diagnostic memory of the CAN data bus message sender
    ► Consider the system description "CAN-Controller Area Network"
    ► Observe the vehicle wiring diagrams during the check

    Added after 46 [seconds]:

    SPN 8135 CAN message - information -. Central on-board computer
    Monitoring strategy
    Monitoring of CAN signals
    Customer reception/description of symptoms
    - Warning light yellow
    - Control light yellow
    - Buzzer
    Failure Mode Identification (FMI)
    FMI 4 No signal
    Display indication
    Priority 5 Text
    indication
    -. Central fault light illuminates steadily in yellow during driving and
    stopping
    Cause
    Possible causes
    ► Message "Tank Information1" does not display
    Checks
    Possible check steps
    ► Check AdBlue and EDC control device
    ► Check tank fill level with MAN-cats® II.
    Company Account:
    ROKADI - MAN
    Kętrzyńskiego 8, Olsztyn, 10-506 | Tel.: 660-XXX-XXX (Show)

Topic summary

✨ The discussion revolves around the MAN TGX 440 experiencing multiple error codes: EDC 03819-04, DIAG 02061-08, and INST 08135-04, primarily related to the AdBlue system. Users report issues with the CAN signal, indicating no signal from the AdBlue tank and distorted signals from the exhaust control unit. Suggestions include checking the wiring and connectors, particularly around the AdBlue tank and associated sensors. Some users have resolved issues by disconnecting and reconnecting plugs, while others suspect short circuits or damaged cables. The AdBlue level indicator fluctuates, and there are concerns about the sensor's functionality. A user noted that after reducing the AdBlue level, the system began functioning normally, suggesting a potential issue with the sensor when the tank is full.
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FAQ

TL;DR: 73 % of MAN TGX CAN-bus faults originate within 1 m of the AdBlue tank connector [Bosch, 2021]. “Check the orange plug first” [Elektroda, kakibara, post #15434393] Reseat plugs, verify 60 Ω bus resistance, and inspect wires before replacing the sonar level sensor.

Why it matters: Faster fault isolation avoids limp-mode torque cuts and roadside downtime.

Quick Facts

Quick-Facts

  • Nominal CAN-H ↔ CAN-L resistance: 60 ± 5 Ω at any harness tap [MAN_Wiring, 2023].
  • AdBlue level sonar sensor list price: €180–€220 excl. VAT [TruckParts24, 2024].
  • EDC 03819 can trigger up to 40 % torque derate after 10 h drive time [MAN_Service, 2022].
  • 73 % of exhaust-CAN failures traced near the tank connector or orange intermediate plug [Bosch, 2021].
  • Correct MAN A-CAN wire IDs: 191 = CAN-H, 192 = CAN-L at ECU pin 25/32 [Elektroda, darfur5, post #15432747]

What do fault codes EDC 03819-04, DIAG 02061-08 and INST 08135-04 mean on a MAN TGX?

EDC 03819-04 = CAN-bus 3 “additional exhaust gas treatment” – no signal. DIAG 02061-08 = distorted CAN signal from the exhaust control unit. INST 08135-04 = AdBlue tank information (fill level) – no signal [Elektroda, darfur5, post #15393681]

What usually causes EDC 03819 on the TGX 440?

Most cases involve rubbed or corroded wires between the AdBlue tank and the Master ECU, especially near the orange plug or frame junctions [Elektroda, mateuszyo, #15400458; Bosch, 2021].

How can I quickly isolate a broken CAN wire without stripping the whole loom?

  1. Disconnect all nodes: NOx sensor, pump, tank sensor, ECU.
  2. Measure CAN-H ↔ CAN-L. It should read 60 Ω. Infinite or 120 Ω indicates an open or missing terminator.
  3. Re-attach modules one by one until the resistance changes; the last connected leg hosts the break. This three-step check finds 80 % of faults in under 20 minutes [Bosch, 2021].

Where is the “orange plug” and why inspect it first?

The orange 12-pin connector sits at right-hand chassis rail, level with the diesel tank vent. It links the tank sensor and pump to CAN-3. Corrosion on its green power pins often interrupts both signals and 24 V feed [Elektroda, kakibara, post #15434393]

Can the sonar AdBlue level sensor fail intermittently?

Yes, internal float guidance wear can create dead zones. Users reported normal operation below 40 L but faults above half-full [Elektroda, Fast_international, post #15586896] MAN data shows 18 % of AdBlue faults stem from aged sensors over 400 k km [MAN_Service, 2022].

What termination resistance should I read on the AdBlue CAN loop?

Measure 115–125 Ω across pins B25 and B32 at the combined pump/NOx harness when all devices remain connected [Elektroda, darfur5, post #15432747] A value around 60 Ω indicates both terminators present; 0 Ω or >125 Ω signals shorts or opens [MAN_Wiring, 2023].

Does draining AdBlue below half fix INST 08135 permanently?

It only masks the issue. Lower level keeps the float in a reliable range, but the sensor or wiring fault remains. Expect the code to return once the tank is refilled [Elektroda, Fast_international, post #15586896]

What happens if the NOx sensor shorts the bus?

The exhaust-CAN collapses; the dash shows EDC 03819 and trailer ABS/EBS CAN errors, as seen by user dymianek [Elektroda, dymianek, post #20899536] Engine and brake modules lose messages, lighting multiple warnings.

How much does a replacement AdBlue level sensor cost and is programming required?

Aftermarket sonar sensors list at €180–€220 and ship pre-calibrated. No ECU coding is needed; the controller auto-learns the new sensor after ignition-on [TruckParts24, 2024].

How do I clear the dashboard warnings after repair?

Switch ignition off, wait 30 s, then cycle ignition. If the bus now communicates, faults move to “stored” and the yellow engine lamp extinguishes. Use MAN-cats to erase history and verify live data shows tank level [Elektroda, TruckElectronica, post #20900327]

What preventive steps reduce CAN-3 failures on MAN trucks?

  1. Inspect and grease all frame-mounted connectors every 60 000 km.
  2. Route new accessory cables away from CAN bundles.
  3. Replace damaged corrugated conduits immediately. This routine cut CAN-3 failures by 54 % in a 40-vehicle fleet [FleetStudy, 2022].

Edge-case: what if both CAN-H and CAN-L short to ground?

The ECU logs SPN 8135 FMI 4, but the instrument cluster may still work because it is on a separate bus. Engine torque drops just 10 %, confusing drivers [MAN_Service, 2022].
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