P159700 - B19/11 Sensor EGT???

[Brewza88]

Morning All,

I have a c350 om642 2013 and keep having my EML come on when I accelerate hard. The car does not go into limp mode or anything and still drives fine. The description of the fault is below:

The signal of component B19/11 (Temperature sensor upstream of turbocharger) is implausible. / 159700 - DFC_EGT_Grdt: Exhaust gas temperature sensor signal is gradient too large.

I have recently had the car mapped and on route the home the light came on which of course you would assume its related as it was not there before, i am told its a coincidence as sensors fail but for me is it too much of a coincidence? Anyone else had this fault and solved it by only replacing?

 

[Trev1964]

I'd not be happy with the mapper if it turns out to be the cause.
Is the sensor expensive to replace?

 

[Tony Dyson]

Morning All,

I have a c350 om642 2013 and keep having my EML come on when I accelerate hard. The car does not go into limp mode or anything and still drives fine. The description of the fault is below:

The signal of component B19/11 (Temperature sensor upstream of turbocharger) is implausible. / 159700 - DFC_EGT_Grdt: Exhaust gas temperature sensor signal is gradient too large.

I have recently had the car mapped and on route the home the light came on which of course you would assume its related as it was not there before, i am told its a coincidence as sensors fail but for me is it too much of a coincidence? Anyone else had this fault and solved it by only replacing?

I wonder if the DPF was attempting a regen to trigger this fault ? I would look at fill levels of the DPF and the temperature profile of B19/11 and perhaps record live data of an active regen for a closer look. Below are three frames of a regen I recently recorded for reference, gradient jumps are significant during a regen!

Frame 484/1190:
B60(Exhaust back pressure sensor) ----- 1.29bar
B19/9(Temperature sensor upstream of diesel particulate filter) ----- 586°C
Air mass ----- 394mg/Hub
B28/8(Diesel particulate filter differential pressure sensor) ----- 0.03bar
B11/4(Coolant temperature sensor) ----- 88°C
B19/11 Temperature sensor upstream of diesel particulate filter) ----- 667°C
Engine speed ----- 1670.50rpm
Injection quantity ----- 20.26mg/Hub
Main odometer reading ----- 84336km
Fill level of diesel particulate filter ----- 100%
Soot content of diesel particulate filter ----- 3g
Ash content of diesel particulate filter ----- 0g
Total distance at last correction of ash content ----- 83910km
Y27/9(Exhaust gas recirculation actuator) ----- 50.14%
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Frame 485/1190:
B60(Exhaust back pressure sensor) ----- 1.27bar
B19/9(Temperature sensor upstream of diesel particulate filter) ----- 584°C
Air mass ----- 405mg/Hub
B28/8(Diesel particulate filter differential pressure sensor) ----- 0.03bar
B11/4(Coolant temperature sensor) ----- 88°C
B19/11 Temperature sensor upstream of diesel particulate filter) ----- 645°C
Engine speed ----- 1670.50rpm
Injection quantity ----- 14.87mg/Hub
Main odometer reading ----- 84336km
Fill level of diesel particulate filter ----- 99%
Soot content of diesel particulate filter ----- 3g
Ash content of diesel particulate filter ----- 0g
Total distance at last correction of ash content ----- 83910km
Y27/9(Exhaust gas recirculation actuator) ----- 50.14%
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Frame 490/1190:
B60(Exhaust back pressure sensor) ----- 1.33bar
B19/9(Temperature sensor upstream of diesel particulate filter) ----- 577°C
Air mass ----- 438mg/Hub
B28/8(Diesel particulate filter differential pressure sensor) ----- 0.04bar
B11/4(Coolant temperature sensor) ----- 89°C
B19/11 Temperature sensor upstream of diesel particulate filter) ----- 680°C
Engine speed ----- 1670.50rpm
Injection quantity ----- 24.89mg/Hub
Main odometer reading ----- 84336km
Fill level of diesel particulate filter ----- 98%
Soot content of diesel particulate filter ----- 3g
Ash content of diesel particulate filter ----- 0g
Total distance at last correction of ash content ----- 83910km
Y27/9(Exhaust gas recirculation actuator) ----- 50.14%

 

[Brewza88]

I'd not be happy with the mapper if it turns out to be the cause.
Is the sensor expensive to replace?

I’m not entirely sure the exact location of the sensor as when googling it comes up with a few options.

 

[Brewza88]

I wonder if the DPF was attempting a regen to trigger this fault ? I would look at fill levels of the DPF and the temperature profile of B19/11 and perhaps record live data of an active regen for a closer look. Below are three frames of a regen I recently recorded for reference, gradient jumps are significant during a regen!

Frame 484/1190:
B60(Exhaust back pressure sensor) ----- 1.29bar
B19/9(Temperature sensor upstream of diesel particulate filter) ----- 586°C
Air mass ----- 394mg/Hub
B28/8(Diesel particulate filter differential pressure sensor) ----- 0.03bar
B11/4(Coolant temperature sensor) ----- 88°C
B19/11 Temperature sensor upstream of diesel particulate filter) ----- 667°C
Engine speed ----- 1670.50rpm
Injection quantity ----- 20.26mg/Hub
Main odometer reading ----- 84336km
Fill level of diesel particulate filter ----- 100%
Soot content of diesel particulate filter ----- 3g
Ash content of diesel particulate filter ----- 0g
Total distance at last correction of ash content ----- 83910km
Y27/9(Exhaust gas recirculation actuator) ----- 50.14%
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Frame 485/1190:
B60(Exhaust back pressure sensor) ----- 1.27bar
B19/9(Temperature sensor upstream of diesel particulate filter) ----- 584°C
Air mass ----- 405mg/Hub
B28/8(Diesel particulate filter differential pressure sensor) ----- 0.03bar
B11/4(Coolant temperature sensor) ----- 88°C
B19/11 Temperature sensor upstream of diesel particulate filter) ----- 645°C
Engine speed ----- 1670.50rpm
Injection quantity ----- 14.87mg/Hub
Main odometer reading ----- 84336km
Fill level of diesel particulate filter ----- 99%
Soot content of diesel particulate filter ----- 3g
Ash content of diesel particulate filter ----- 0g
Total distance at last correction of ash content ----- 83910km
Y27/9(Exhaust gas recirculation actuator) ----- 50.14%
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Frame 490/1190:
B60(Exhaust back pressure sensor) ----- 1.33bar
B19/9(Temperature sensor upstream of diesel particulate filter) ----- 577°C
Air mass ----- 438mg/Hub
B28/8(Diesel particulate filter differential pressure sensor) ----- 0.04bar
B11/4(Coolant temperature sensor) ----- 89°C
B19/11 Temperature sensor upstream of diesel particulate filter) ----- 680°C
Engine speed ----- 1670.50rpm
Injection quantity ----- 24.89mg/Hub
Main odometer reading ----- 84336km
Fill level of diesel particulate filter ----- 98%
Soot content of diesel particulate filter ----- 3g
Ash content of diesel particulate filter ----- 0g
Total distance at last correction of ash content ----- 83910km
Y27/9(Exhaust gas recirculation actuator) ----- 50.14%

Thanks for the info. I have just changed the thermostat as that was failing which the car is reaching temp perfectly.
I will do a live scan today and have a look I’m using the app Carly which shows some info but your report seems more detailed, what are you using may I ask?

 

[steveq]

I had that fault and it was resolved by replacing the sensor.
It is bolted into the exhaust manifold.
You can check the values if you have a good OBD reader. I used an iCarsoft i980 at the time I replaced mine.
I checked the temp value of that sensor when the engine was cold and not running. It should have been showing the same temp as the coolant (and the same temp as the atmosphere).
Then start the car and watch the value shoot up.
When mine was faulty the temp shown by the sensor when the engine was cold and not running was stuck at around 250deg C.

So, I suggest that you check the values in a variety of situations.

 

[Brewza88]

 

[Brewza88]

This is what I’m seeing which does not read right at all

 

[Tony Dyson]

Thanks for the info. I have just changed the thermostat as that was failing which the car is reaching temp perfectly.
I will do a live scan today and have a look I’m using the app Carly which shows some info but your report seems more detailed, what are you using may I ask?

iCarsoft MB v2.0 it has a data recording and reporting function that I have found very handy for record purposes.

This is what I’m seeing which does not read right at all

Agreed, I guess n/a in Carly speak is 'we don't do that one' and all the negative readings are unexpected to say the least?
ETA, Just noticed the odo reading, that's some mileage ?

 

[DaveInUK]

iCarsoft MB v2.0 it has a data recording and reporting function that I have found very handy for record purposes.

I've just started using the iCarSoft MB II and have attempted to use the record function.

I've enabled Record in Settings then run a full diagnostic but there isn't any instruction on what to do next to access the recording?

On the iCarSoft website it says use the USB to connect the MB II to a PC.

The PC doesn't recognize the USB connection (which is confirmed as normal by a previous post from @flowrider)
How do you access the recording?
Dave

 

[Tony Dyson]

I've just started using the iCarSoft MB II and have attempted to use the record function.

I've enabled Record in Settings then run a full diagnostic but there isn't any instruction on what to do next to access the recording?

On the iCarSoft website it says use the USB to connect the MB II to a PC.

The PC doesn't recognize the USB connection (which is confirmed as normal by a previous post from @flowrider)
How do you access the recording?
Dave

Mine is the MB v2.0 and not the MBII as yours! but if it's the same...
First plug in your scanner to your PC with the cable supplied and when you launch your PC Client software you are presented with two options, Report Printer or Upgrade, select the first option then all recordings you have made will appear in a window as separate files.

 

[DaveInUK]

Thanks for the quick reply.
The Update software I'm using is different to yours.
The only way I can get the PC to recognise the MB II is by inserting the MicrcoSD directly into a PC USB port ( shown here as F )
But I can only see "Restore" or "Update" buttons.
Am I using the wrong software?
Dave

 

[LostKiwi]

Really?!!!!


Something is very amiss with all those readings..

 

[alexanderfoti]

I suspect it's saying that the difference between upstream and downstream is too large, but it's possible that your egts are to high after the tuning (which Is possible if it's really agressive).

The sensors do fail quite often though

 

[supernoodle]

Yes, that live data is all rubbish.

The temperature gradient DFC_EGT_Grdt is there to identify when sensed voltage changes to much to be possible between consecutive readings. It's purpose is to identify intermittent issues like a poor electrical connection. That could be the vehicle wiring or sensor internals.

 

[Tony Dyson]

Thanks for the quick reply.
The Update software I'm using is different to yours. View attachment 74790
The only way I can get the PC to recognise the MB II is by inserting the MicrcoSD directly into a PC USB port ( shown here as F )
But I can only see "Restore" or "Update" buttons.
Am I using the wrong software?
Dave

I guess that's just one of the differences between iCarsoft's MB v2.0 and MB II !