General 2018 Ducato nox sensor code p2200-15

[theoneandonly]

This is a little investigation i was part of for a non member (i only did the analysis) The actual leg work, data collection and spotting the chaffed wire done by @Fredastaire. It is included here to complement other P2200 threads, particularly because it refers to a sensor that does not exist on this model. Also confirmation of our diagnosis would help.
Previously the problem was resolved by replacing the precat temperature probe, which was identified by live data.
The vehicle is a 68 plate pickup. the van was taken for a run with my template 4 and gave the following graphs.

The graph does not show the characteristics of a shorting sensor.


Along with the DPFs temps the following concerned me

Particulate filter clogging​	Distance from last DPF regeneration​
111.41​	3.1​

Basicaly the van had just finished a Regen but no reduction in particulates and no obvious sensor issues.
A discussion lead to the revalation that a previous run had only given straight lines.
Looking at that data gave the following.

My conclusion No +5V or 0V line to sensors and possibly intermittant. So start looking for chaffed wireing. Yes there are chaffed wires.
This is where a wiring diagram for the twin egr X290 would be handy. Any Ideas for sensor wire colours.

 

[Solidgb]

This is a little investigation i was part of for a non member (i only did the analysis) The actual leg work, data collection and spotting the chaffed wire done by @Fredastaire. It is included here to complement other P2200 threads, particularly because it refers to a sensor that does not exist on this model. Also confirmation of our diagnosis would help.
Previously the problem was resolved by replacing the precat temperature probe, which was identified by live data.
The vehicle is a 68 plate pickup. the van was taken for a run with my template 4 and gave the following graphs.
View attachment 443290
The graph does not show the characteristics of a shorting sensor.
View attachment 443291View attachment 443292View attachment 443293View attachment 443294View attachment 443295

Along with the DPFs temps the following concerned me

Particulate filter clogging​	Distance from last DPF regeneration​
111.41​	3.1​

Basicaly the van had just finished a Regen but no reduction in particulates and no obvious sensor issues.
A discussion lead to the revalation that a previous run had only given straight lines.
Looking at that data gave the following.
View attachment 443296View attachment 443297View attachment 443298View attachment 443299
My conclusion No +5V or 0V line to sensors and possibly intermittant. So start looking for chaffed wireing. Yes there are chaffed wires.
This is where a wiring diagram for the twin egr X290 would be handy. Any Ideas for sensor wire colours.

Hello all,
I have just joined the forum as I own a 2016 twin EGR 2.3 Ducato. I purchased the vehicle in September 2020 and until now, with 20k miles driven, no issues. However the MIL has come on and a friend has used his OBD2 reader to find the error "P2200-15-NOx sensor 1 - Short to +V or open circuit".
I spent a long time researching all about the EGR issues etc but we have checked and it has been updated to the v32 software prior to my ownership.
I was hopeful that @Fredastaire might be able to advise where he found the chaffed wiring. A good place to start looking!

 

[Fredastaire]

Stand in front of your van with bonnet up. In front of you highish up is a black plastic box with popes coming to you.(This is the vacuum reservoir).
To your left of it is a fancy metal bracket with two connectors clipped on. Slightly lower is a third connector. Follow the wire leads over the top of the engine; two more wires join so now there are five.
.
These five multi wire cables go into a plastic clip that is sort of on a pillar clipped to an engine mounted bracket.
.
On the Ducato I sorted fault finding it was at this pillar clip of five wires that it had chafed through the outer sleeve of the multiple wire then chafed the individual internal wires insulations to a point of intermittent shorting. The engine obviously rocks to and fro just enough for the abrasive damage.
.
Using electric insulation tape solved the error codes.
.
It's not my Ducato so what the owner did next I don't know. He did report back two weeks later that all was error free.
.
Hope this helps.

 

[Fredastaire]

I ask @Solidgb , just wondering if the notes above helped you, I forgot to include your name so maybe you didn't get notifications.
@theoneandonly you might wish to read my above notes.

 

[theoneandonly]

@Solidgb @Fredastaire hope following is useful, from

@deejays

 

[Fredastaire]

On the Ducato I fault finded on, the errant plastic clip is out of shot on the photo, it's further over top left of the photo

 

[Solidgb]

Fantastic posts from you both, very helpful.
I had a quick look this morning and on a quick cursory inspection there is no visible damage to the wiring, interestingly after fiddling with it I no longer have the MIL on. I am aiming to have a proper look at it tomorrow and I will be sure to report back.
Once again thank you both for your input.

 

[Solidgb]

So a longer inspection confirmed no visible damage to the exterior of the wires. I took the connectors apart and then reconnected them. A couple of the connectors were dislodged from the bracket supporting the vacuum reservoir, these were reinstated but there was absolutely no tolerance in the cables, so I bent the bracket backwards to create a little slack. No MIL when I started the engine but I will monitor it further to ensure the problem is solved.
Thankyou once again for your help.