Yellow Engine Light (Engine Check Light) ECL

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G-Barry
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Hi    I have a 2011 G 350 diesel.   The yellow / orange

engine light has come on today,  Does anybody know what I should be looking for?   The engine oil is fine, same with coolant.  Engine runs okay with no loss of power.

Anybody have any ideas?   Manual says could be engine management, fuel injection system, exhaust system,fuel system, diesel particulate filter.  

Any thoughts would be appreciated. 

Barry

 

 

 

 

Jdring
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Re: Yellow Engine Light

So called Check Engine Light (CEL).  If you cycle through Comand, I think it should tell you what the problem is, under faults.

My bet would be anything to do with AdBlue and NOX sensors.  Though that also starts counting down the number of starts you have left o:  

If that doesn't tell you, get a Bluetooth OBD code scanner and see what faults the ECU has logged with that, or take it to a MB indie for a STAR diagnosis.  The OBD port is in the passenger footwell.

G-Barry
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Re: Yellow Engine Light

Thank Jdring.  Much appreciated. 

Barry

G-Barry
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Re: Yellow Engine Light

.Thought I would provide an update on the Check Engine Light (CEL) that recently came on.

It was an a fault with the AdBlue Heater.   The light was turned off and I am in the process of getting a price for a replacement.  

May wait to see if the light comes back on again, and if so may be a lose wire or something, but most probably not.  

I will update when I know more.

Regards Barry

 

G-Barry
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Re: Yellow Engine Light

I have been doing some checking and even though it doesn’t sound like it, this looks to be a very very expensive fix if the AdVlue Heater does need replacing.   

Does anyone have experience with this?

Also, does anyone know where the AdBlue heater is located?   Mercedes Tod me to check wiring and corrosion on the plug.

I have read some forums and they talk of a Mercedes software upgrade.   

Like I have said above, the ECL light has been reset.  I will now need to see if it comes back on or not.

 

gav.helme
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Re: Yellow Engine Light (Engine Check Light) ECL

Not my specialist subject

But I think the Adblue heater unit is located in the top of the Adblue Tank with the Delivery Module 

So would think the wiring connections are within 6" of it and fully exposed to everything thrown at it from the road! 

gav.helme
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Re: Yellow Engine Light (Engine Check Light) ECL

Not my specialist subject

But I think the Adblue heater unit is located in the top of the Adblue Tank with the Delivery Module 

So would think the wiring connections are within 6" of it and fully exposed to everything thrown at it from the road! 

G-Barry
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Re: Yellow Engine Light (Engine Check Light) ECL

Thanks Gav.      

Just an update. Mercedes tell me it it actually in the AdBlue tank.

 

 

G-Barry
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Re: Yellow Engine Light

Jd.  I just purchased an OBD scanner.   I would not have known about this and where to plug it in without you.  Thanks.   Barry

Jdring
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Re: Yellow Engine Light

G-Barry wrote:

Jd.  I just purchased an OBD scanner.   .....

The plug is universal, you can run many Apps that connect to it (bluetooth).  Some are professional level and cost money but the freebie I use which is pretty handy is TorqueScan (by Ian Hawkins).  You will find it in the AppStores.  It seems able to reset basic CEL errors, and you wouldn't want to mask anything more serious anyway.  It will list the ECU faults, if any, and give you something to research to Map to a MB issue.  But it also gives you great dials and graphs for boost pressue, NOX, temps, averages, etc etc.  

Interested if anyone else recommends another tool...

G-Barry
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Re: Yellow Engine Light

Again, a big thanks.  Barry