Mercedes Actros MP4 Euro6 - Adblue Error 900c03 on ACM System: Troubleshooting & Description

Question

Hello. I have error 900c03 on Acm system. Can someone post a description?

Gerri · Answer

900C03 - Component A70 (NOx sensor control unit, exhaust aftertreatment unit inlet) od defective.

Under_Pressure · Answer

Nox sensor before the catalyst replaced with the original. After 3 days this error popped up.

Under_Pressure · Answer

Hello. I changed the Nox behind the catalyst and the problem has disappeared, although it did not throw an error on it. A question for colleagues with more experience, if you change Nox, it's two at once? Does it depend on something?

PrzemekF1 · Answer

Hello, how about this error with nox, a? Did the problem persist after replacing the second one? I have the same problem, xentry says that the nox before the catalyst, I replaced it with a new one, the error was deleted (970C07) On the second day after a few kilometers, it jumped up again, advertise the sensor or replace it behind the angle?

Under_Pressure · Answer

I then replaced two and only the problem disappeared, but will it be the same for you ... You have a different error, you could post a description.

Under_Pressure · Answer

970C07 - Component A70 (NOx sensor control module inlet to aftertreatment unit) is defective.

PrzemekF1 · Answer

Ok, thanks for the description, I couldn't dig up this code at the moment

Chavez · Answer

Remember that the pre-cat NOx sensor is mounted on the back of the catalytic converter (rear wheel side).

Under_Pressure · Answer

Buddy, from what I remember, the Nox in front of the executioner is behind the fender of the front right wheel

Chavez · Answer

That's how it is in E5.

WICI2000 · Answer

Hello and welcome,

MP4 2013 E5
I get error 970C07 and 061105 in ACM, I can't find information about the sensor before or after the cat. Ask for help from smarter colleagues. I will add that the car drives normally - power and Vmax ok.

hubert04 · Answer

Nox in front of the cat is between the tank and the cat, and behind the catalyst is just behind the front wheel fender and this relationship is a bit confusing

Under_Pressure · Answer

ACM 061105 Item R6 Adblue return line heating element is open.

Gerri · Answer

Only the query is for an early year - 2013. And what you wrote is for a later one. 970C07 The conditions for operational readiness of component 'A70 b1 (NOx sensor, exhaust aftertreatment unit inlet)' were not put in place in time. According to the description of the error, in 2013, the A70b1 sensor is placed at the entrance of the exhaust system (the pipe between the engine and the muffler). The year of the car may suggest that the temporary lack of communication with the sensor is caused by damaged cables. The second most likely cause is of course a faulty sensor.

WICI2000 · Answer

Thank you all for your interest in my problem. I checked all the cables from the sensor - the passage is there, although you can see that someone has already rummaged there harder (silicone and insulating tape ) I replaced the sensor with a new one and unfortunately nothing has changed. Both bugs are still active. What's next? Have any ideas?

Gerri · Answer

There was a service action for pumping water through electrical wires - maybe you came across it. Poor at reading. I did not check error 061105, but if the description is correct (interrupted heater circuit), then do not imagine that after replacing the sensor, the heater will miraculously recover. You can drive with this error - it does not light the indicator. However, immediately after replacing the NOx, the error rarely disappears by itself. Usually you have to drive a dozen or so kilometers for the sensor to warm up and start giving the parameters correctly. Then the error becomes memorized and can be deleted.

Wici85 · Answer

Sorry, I expressed myself wrong. I know that the heater won't fix itself from replacing the sensor ?

Today I drove the Merc about 50 km. It seems that should be enough. Texa, however, still shows the message "Operating temperature not reached" (ref. error 970C07).

In addition, the description "cut off" appeared next to the code 061105. It seems to me that there was a "short to ground" before.

One more issue bothers me - the message on the board "Reactions when driving and braking". I can't find anything sensible about it anywhere... Anyone?

Under_Pressure · Answer

Go to the parameters and see what temperature Nox shows in front of the angle. And did you look into this heater or did you just read the error? Do you happen to have any errors in EBS?

gucio~1 · Answer

Gerri previously gave the correct description of the 970C07 - the readiness of the nox sensor downstream of the A70 catalytic converter was not reached in the assumed time.
A70 is a sensor with a black plug.

Under_Pressure · Answer

The description is correct, but the sensor is in front of the catalyst.

Wici85 · Answer

Gentlemen, the issue with exhaust gas recirculation is settled. Replacement of the sensor (before the executioner), a little improvement of the cables after the predecessors and ... It worked ?
Thank you all for your help.

All I have left is "trailer control solenoid valve with pressure sensor" 200404 - short to ground. Please let me know where to look. I don't really want to rip the whole bundle ?

Mercedes Actros MP4 Euro6 - Adblue Error 900c03 on ACM System: Troubleshooting & Description

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