Independent mech. says only dealership can fix my GL350
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GL350
Independent mech. says only dealership can fix my GL350
Due to some managing of a 3rd party extended warranty and a disagreement with the dealer over the price of parts, I found myself at a reputable independent dealer in town.
The CEL code is for a new NOX sensor, and the indy says he can't do the work because to re-code the car, he needs to have a "live data connection" to the MB head office, and only the dealers have that.
I'm assuming he was referring to the most recent version of Star Diagnostic.
Am I getting fed a line?
Is there work that can ONLY be done at the dealership?
The CEL code is for a new NOX sensor, and the indy says he can't do the work because to re-code the car, he needs to have a "live data connection" to the MB head office, and only the dealers have that.
I'm assuming he was referring to the most recent version of Star Diagnostic.
Am I getting fed a line?
Is there work that can ONLY be done at the dealership?
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easy with that one.
what are the codes?
generally when the nox sensor misbehaves there is an underlying reason which if not found will continue to throw nox- related codes and/ or appear as the sensor is bad.
there are many coding procedures which require "authentication"/ validation from the star/ das mothership and thus pirated versions of star/ das cannot do.
what are the codes?
generally when the nox sensor misbehaves there is an underlying reason which if not found will continue to throw nox- related codes and/ or appear as the sensor is bad.
there are many coding procedures which require "authentication"/ validation from the star/ das mothership and thus pirated versions of star/ das cannot do.
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"nox out of bounds" codes are usually related to carbon build up and other similar engine asthma-related conditions
the freeze data will show why the codes were thrown and if nox is bad or just reading out of bounds
the freeze data will show why the codes were thrown and if nox is bad or just reading out of bounds
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GL350
that doesn't sound good. Maybe I should get my warranty claims department to start warming up their keyboards?
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2010 GL350, 2005 BMW X5 4.8is, 2015 BMW 328d
I agree it may be carbon build up due to slow acceleration and excessive city driving, remedied by mashing the pedal at the freeway on-ramp occasionally and long distance trips.
http://www.mbusa.com/vcm/MB/DigitalA...on_booklet.pdf
Last edited by drgeeforce; Aug 6, 2014 at 07:48 PM.
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GL350
Here is what it says on the dealerships report:
"81239 CEL is on. Check Codes- 134V00 Lower limit of upstream Nox sensor reached, along with 3 other upstream Nox sensors are stores in the CDI control unit. Fault Trace codes. Internal electrical fault is present in the upstream NOx sensor. May possibly be other issues but need to start with upstream Nox sensor replacement. "
Maybe I can the dealership to give me the exact codes that they are referencing.
"81239 CEL is on. Check Codes- 134V00 Lower limit of upstream Nox sensor reached, along with 3 other upstream Nox sensors are stores in the CDI control unit. Fault Trace codes. Internal electrical fault is present in the upstream NOx sensor. May possibly be other issues but need to start with upstream Nox sensor replacement. "
Maybe I can the dealership to give me the exact codes that they are referencing.
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Here is what it says on the dealerships report:
"81239 CEL is on. Check Codes- 134V00 Lower limit of upstream Nox sensor reached, along with 3 other upstream Nox sensors are stores in the CDI control unit. Fault Trace codes. Internal electrical fault is present in the upstream NOx sensor. May possibly be other issues but need to start with upstream Nox sensor replacement. "
Maybe I can the dealership to give me the exact codes that they are referencing.
"81239 CEL is on. Check Codes- 134V00 Lower limit of upstream Nox sensor reached, along with 3 other upstream Nox sensors are stores in the CDI control unit. Fault Trace codes. Internal electrical fault is present in the upstream NOx sensor. May possibly be other issues but need to start with upstream Nox sensor replacement. "
Maybe I can the dealership to give me the exact codes that they are referencing.
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GL350
Engine adaptations? Do you mean mods?
And can I erase codes without a C3/C4?
BTW: your help is greatly appreciated....I've used a number of your posts as reference since I got this vehicle.
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Yes, codes and engine adaptions can be reset with c3/c4. It is in the engine management module.
The codes for broken sensor is usually "signal implausible" error confirmed by looking at the freeze data. Not seeing that message in your post. So, you still might have a dead sensor, but i would try some simple steps before starting to replace parts.
Last edited by alx; Aug 8, 2014 at 07:50 AM.
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2010 GL350, 2005 BMW X5 4.8is, 2015 BMW 328d
Biodiesel also causes Nox upstream values to be higher.
A faulty EGR can cause Nox to rise.
A loose timing chain can cause MAP to add more fuel increasing CO making the gas analyzer to read more Nox.
Conversely, if the timing is too advanced, preignition will make Nox.
Exhaust valves if scored with carbon will release more Nox.
The Star C3/4 costs $300+.
A $50 OBD will give you better info for the money
A faulty EGR can cause Nox to rise.
A loose timing chain can cause MAP to add more fuel increasing CO making the gas analyzer to read more Nox.
Conversely, if the timing is too advanced, preignition will make Nox.
Exhaust valves if scored with carbon will release more Nox.
The Star C3/4 costs $300+.
A $50 OBD will give you better info for the money
Last edited by drgeeforce; Aug 11, 2014 at 12:58 PM.
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GL350
Ok, here are the codes from my brand new C3 from Shardul:
134C00 - The lower limit value of component NOx sensor upstream of SCR catalytic converter was dropped below/not reached.
135400 Short circuit in component NOx sensor upstream of SCR catalytic converter
149C00 Component NOxsensor upstream of SCR catalytic converter is not operational
153600 Component NOx sensor upstream of SCR catalytic converter has internal fault.
Sounds to me that it's more than just a carbon thing?
134C00 - The lower limit value of component NOx sensor upstream of SCR catalytic converter was dropped below/not reached.
135400 Short circuit in component NOx sensor upstream of SCR catalytic converter
149C00 Component NOxsensor upstream of SCR catalytic converter is not operational
153600 Component NOx sensor upstream of SCR catalytic converter has internal fault.
Sounds to me that it's more than just a carbon thing?
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2010 GL350, 2005 BMW X5 4.8is, 2015 BMW 328d
134C00...component NOx sensor upstream of SCR catalytic converter...
135400...component NOx sensor upstream of SCR catalytic converter...
149C00 Component NOxsensor upstream of SCR catalytic converter...
153600 Component NOx sensor upstream of SCR catalytic converter...
Sounds to me that it's more than just a carbon thing?
135400...component NOx sensor upstream of SCR catalytic converter...
149C00 Component NOxsensor upstream of SCR catalytic converter...
153600 Component NOx sensor upstream of SCR catalytic converter...
Sounds to me that it's more than just a carbon thing?
from Captain Obvious:
Sounds like to me your "NOx sensor upstream of the SCR catalytic converter" is out.
Last edited by drgeeforce; Aug 31, 2014 at 02:38 PM.
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GL350
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2010 GL350, 2005 BMW X5 4.8is, 2015 BMW 328d
What year is your vehicle? NOx sensor is emissions related, it is probably still under warranty. In CA we get 7y/70K. http://www.mbusa.com/vcm/MB/DigitalA...on_booklet.pdf
see page 43.
If Dealer says no go, I'd try what alx recommended, reset, drive it hard for a week see if it resolves the DTC.
If you're a DIYer I sometimes use getmercedesparts.com. If you're feeling frugal, try aliexpress.com/store/group/NOX-SENSOR/
see page 43.
If Dealer says no go, I'd try what alx recommended, reset, drive it hard for a week see if it resolves the DTC.
If you're a DIYer I sometimes use getmercedesparts.com. If you're feeling frugal, try aliexpress.com/store/group/NOX-SENSOR/
Last edited by drgeeforce; Sep 2, 2014 at 07:00 PM.
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GL350
I exported the car to Canada, so I'm not sure if the emissions warranty would still be in place or not.
Would driving it with a broken N0x sensor (assuming the worst), hurt the vehicle?
Mine is a 2012.
Would driving it with a broken N0x sensor (assuming the worst), hurt the vehicle?
Mine is a 2012.
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2010 GL350, 2005 BMW X5 4.8is, 2015 BMW 328d
Clean-Diesel has three parts, the particulate filter, the oxidizer, followed by the reducer.
Driving with a faulty NOx sensor could damage the Selective Catalytic Reduction (SCR) causing you to lose the clean-diesel aspect of TDI.
1. if the sensor misreads the upstream nitrogen oxides as high, this forces more urea (DEF) to be used in the SCR, any excess will corrode the catalyst.
2. if the sensor reads the stream as low, then it uses less DEF, releasing more smog into the atmosphere. It also overloads the catalyst with substrate and the feedback loop to the oxidizer will cause it to overheat or melt.
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Ok, here are the codes from my brand new C3 from Shardul:
134C00 - The lower limit value of component NOx sensor upstream of SCR catalytic converter was dropped below/not reached.
135400 Short circuit in component NOx sensor upstream of SCR catalytic converter
149C00 Component NOxsensor upstream of SCR catalytic converter is not operational
153600 Component NOx sensor upstream of SCR catalytic converter has internal fault.
Sounds to me that it's more than just a carbon thing?
134C00 - The lower limit value of component NOx sensor upstream of SCR catalytic converter was dropped below/not reached.
135400 Short circuit in component NOx sensor upstream of SCR catalytic converter
149C00 Component NOxsensor upstream of SCR catalytic converter is not operational
153600 Component NOx sensor upstream of SCR catalytic converter has internal fault.
Sounds to me that it's more than just a carbon thing?
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2011 GL450
NOX sensor
If the code was only for a sensor range issue, then I would suggest soaking the adblue injector overnight in distilled water. Those things get crystallization in them from the urea in the adblue. Since it is showing an internal fault, then it probably does need the NOx sensor. I'm pretty sure you don't have to go live with MB to code anything. If you do, you can get a one day use for StarTekinfo that will let you code and program with the SDS/DAS.
