I have a problem with Man TGX 18.440, it stopped downloading adblue and the error 05508-04 and 05031-02 lit up. After replacing the main and pre-filters, 05031-02 (overspeed detection and pump motor lock) went out, but still 5508 CAN error (NO1 message) remained. The car has no strength. Any...

Check the wiring harness for the NOx module behind the right front wheel arch, it likes to rub. Tomorrow I will check Man-CATs what exactly this error means and I will let you know around noon if none of my colleagues will tell me.

5031 AdBlue pump blocked Check the AdBlue pump for operation and correctness. The pump speed in the activated state drops below the minimum speed. 5508 CAN error (message NO1) Control of CAN messages for errors in timing, signals, comprehensibility Data record error Currently, there is no impact on the functionality of the system.

Thanks colleagues for the quick reply and suggestions. Buddy @ diablo23248, tomorrow I will check Nox and let you know. I also took out the injector and dispenser to clean, but I doubt that it will help.

As Colleague 5508-04 wrote, CAN error (NOI message) no signal.

Thanks again, fault diagnosed. The problem is a blown contact in the plug in the NOx sensor. Water got in (the rest scorched) Pin 1. Do you know if this sensor can be disassembled? Anyone doing this? Will I be replaced by one small pin?

It is possible to undress, the rest is manual skill.

NOx disassembled, soldered, still error 05508-04 (regardless of whether the plug is inserted or not). Before that, there was definitely no contact. Where are the wires leading from this sensor?

New sensor. How can you be sure that it will show the correct values? If there is a second car, it is worth swapping places.

Problem solved. The sensor electronics were also damaged. After replacing the sensor and removing the short circuit, the problem disappeared. A short circuit at the plug to the module burned NOx. Thank you very much to all forum members for their help.

Man TGX 18.440 - AdBlue Issues, Error 05508-04, 05031-02, Filters Replacement & CAN Error NO1

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#1 13313734 17 Feb 2014 16:29

mateuszyo mateuszyo

Level 11

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Post #1
13313734 17 Feb 2014 16:29

I have a problem with Man TGX 18.440, it stopped downloading adblue and the error 05508-04 and 05031-02 lit up. After replacing the main and pre-filters, 05031-02 (overspeed detection and pump motor lock) went out, but still 5508 CAN error (NO1 message) remained. The car has no strength. Any ideas what this error 5508 could mean and where to look for the reason?
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#2 13314423 17 Feb 2014 19:25

diablo23248 diablo23248

Level 28

» | Positive voted Helpful post? (+7)

Helpful post
Post #2
13314423 17 Feb 2014 19:25

Check the wiring harness for the NOx module behind the right front wheel arch, it likes to rub. Tomorrow I will check Man-CATs what exactly this error means and I will let you know around noon if none of my colleagues will tell me.
#3 13314497 17 Feb 2014 19:40

MAN Electronics MAN Electronics

VIP Meritorious for electroda.pl

» | Positive voted Helpful post? (+7)

Post #3
13314497 17 Feb 2014 19:40

5031
AdBlue pump blocked
Check the AdBlue pump for operation and correctness. The pump speed in the activated state drops below the minimum speed.

5508 CAN error (message NO1)
Control of CAN messages for errors in timing, signals, comprehensibility
Data record error
Currently, there is no impact on the functionality of the system.
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#4 13314616 17 Feb 2014 20:08

mateuszyo mateuszyo

Level 11

» | Topic author Helpful post? (+2)

Post #4
13314616 17 Feb 2014 20:08

Thanks colleagues for the quick reply and suggestions. Buddy @ diablo23248, tomorrow I will check Nox and let you know. I also took out the injector and dispenser to clean, but I doubt that it will help.
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#5 13316219 18 Feb 2014 09:19

diablo23248 diablo23248

Level 28

» | Positive voted Helpful post? (+6)

Post #5
13316219 18 Feb 2014 09:19

As Colleague 5508-04 wrote, CAN error (NOI message) no signal.
#6 13316880 18 Feb 2014 13:08

mateuszyo mateuszyo

Level 11

» | Topic author Helpful post? (+3)

Post #6
13316880 18 Feb 2014 13:08

Thanks again, fault diagnosed. The problem is a blown contact in the plug in the NOx sensor. Water got in (the rest scorched) Pin 1. Do you know if this sensor can be disassembled? Anyone doing this? Will I be replaced by one small pin?
#7 13316960 18 Feb 2014 13:34

MAN Electronics MAN Electronics

VIP Meritorious for electroda.pl

» | Helpful post? (+2)

Post #7
13316960 18 Feb 2014 13:34

mateuszyo wrote:
Do you know if this sensor can be disassembled?

It is possible to undress, the rest is manual skill.
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#8 13322003 19 Feb 2014 18:28

mateuszyo mateuszyo

Level 11

» | Topic author Positive voted Helpful post? (+8)

Post #8
13322003 19 Feb 2014 18:28

NOx disassembled, soldered, still error 05508-04 (regardless of whether the plug is inserted or not). Before that, there was definitely no contact. Where are the wires leading from this sensor?
#9 13322361 19 Feb 2014 19:35

serwis_gh serwis_gh

Diesel injection systems specialist

» | Helpful post? (+2)

Post #9
13322361 19 Feb 2014 19:35

New sensor. How can you be sure that it will show the correct values? If there is a second car, it is worth swapping places.
#10 13349246 26 Feb 2014 21:08

mateuszyo mateuszyo

Level 11

» | Topic author Positive voted Helpful post? (+6)

Post #10
13349246 26 Feb 2014 21:08

Problem solved. The sensor electronics were also damaged. After replacing the sensor and removing the short circuit, the problem disappeared. A short circuit at the plug to the module burned NOx. Thank you very much to all forum members for their help.
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Topic summary

The discussion revolves around issues with the MAN TGX 18.440 related to AdBlue system errors, specifically error codes 05508-04 and 05031-02. The user reported that after replacing the main and pre-filters, the 05031-02 error (indicating overspeed detection and pump motor lock) was resolved, but the 05508 CAN error (NO1 message) persisted, leading to a loss of vehicle power. Suggestions included checking the wiring harness for the NOx module for damage, inspecting the AdBlue pump for blockages, and diagnosing the NOx sensor for potential water damage. Ultimately, the problem was traced to a blown contact in the NOx sensor plug, which was repaired, but the sensor electronics were also found to be damaged. After replacing the sensor and addressing the short circuit, the issues were resolved.
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Man TGX 18.440 - AdBlue Issues, Error 05508-04, 05031-02, Filters Replacement & CAN Error NO1

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