Remain calm people.

1. Potential problem No 1.
Have you recently just filled your AdBlue tank?
Your tank has a capacity (XE capacity is 9 litres) if you over fill your tank you could potentially get this error message.

The 163D has a 9 litre tank but the 180D has a 16 litre tank. If you have the 163D put in 5 litres and if you have a 180D put in 10 litres to be on the safe side when the warning appears.

 

Impressive post Mike.

Fortunately my XE is petrol rather than diesel. But many others will appreciate the clear practical advice. It is amazing what you can achieve with an OBD II meter and some clear instructions

I have one minor question (general interest only). Why is the system so sensitive to overfilling? That seems like a completely unnecessary PITA.

 

Thanks for your kind words. So I believe the system
Is sooooo sensitive because JLR are running the parameters so very close to the cut-off line. This could all be very simple to make robust, but our road tax would go through the roof. I think it's almost like the VW scandal, but without the scandal.

 

Remain calm people.

I'll keep this brief (as I can) feel free to ask any questions.

First of all, your Jaguar or Land Rover hasn't got a DEF quality detector. What this message really means is, there is a problem somewhere between your DEF tank, exhaust and ad blue injector.

1. Potential problem No 1.
Have you recently just filled your AdBlue tank?
Your tank has a capacity (XE capacity is 9 litres) if you over fill your tank you could potentially get this error message.
FIX. Remove your rear left wheel and wheel lining to gain access to the bottom of your AdBlue tank. Find the drain hose and drain some out. After this you will need an OBD II meter to reset the message. This won't fix the problem but should change the message to "Diese Exhaust Fluid Dosing Malfunction". After this take the car for a short country road drive, get the engine nice and warm and plug in your OBD II meter again and clear any messages. A short drive later and a few cycles through engine on/off and ignition on/off and you problem should be solved. &#x1f44d-1f3fb;.

2. Potential problem No 2
Your AdBlue might just be old, if its been in the tank for a while it may have just gone bad. If this is the case I won't burn away those nasties in your exhaust, which would cause the NOx sensor in your exhaust to detect high carbon emissions nothing to do with carbon, it is high NOx levels and display this message.
FIX. Remove your rear left wheel and wheel lining to gain access to the bottom of your AdBlue tank. Find the drain hose and drain the AdBlue out. Pour a litre of new AdBlue in to the take and drain that out too, just to give it a nice wash. After this you will need an OBD II meter to reset the message. This won't fix the problem but should change the message to "Diese Exhaust Fluid Dosing Malfunction". After this take the car for a short country road drive, get the engine nice and warm and plug in your OBD II meter again and clean any messages. A short drive later and a few cycles through engine on/off and ignition on/off and you problem should be solved. &#x1f44d-1f3fb;.

3. Possible problem No 3.
Your AdBlue gets injected into your exhaust via the AdBlue injector 😱. Have you ever noticed all the white crystallisation around your DEF cap? You could have the same white crap all over your AdBlue injector nozzle. To find out you'll need a jack and an 8mm socket.
Fix. Jack up your car at the front right wheel as high as you dare. Make sure to get an axle stand under there too, safety first. You'll find your AdBlue injector clamped to the exhaust with just one jubilee style clip. Remove the clip, the AdBlue line and the electrical clip and your injector will come away without a fight. Wash the nozzle (if required) with warm water. I've found that a Lucozade sport bottle works well for this. After this you will need an OBD II meter to reset the message. This won't fix the problem but should change the message to "Diese Exhaust Fluid Dosing Malfunction". After this take the car for a short country road drive, get the engine nice and warm and plug in your OBD II meter again and clean any messages. A short drive later and a few cycles through engine on/off and ignition on/off and you problem should be solved. &#x1f44d-1f3fb;.

4. Possible problem No 4.
NOx sensors. NOx sensors (Or lambada sensors) a NOx sensor is not a lambda sensor, they are completely different and the XE diesel has both. A lambda sensor measures the oxygen concentration in the exhaust relative to ambient air to work out the air fuel ratio and a NOx sensor measures the level of NOx in the exhaust gas don't last forever unfortunately, they're about £100 or so and from research last around 7 years or 65,000 miles. Which isn't a lot!!! From research I've seen pictures of their electrical wires plastic sheathing eroded away from vibrating on your under tray. If this has happened and the wires are exposed, unfortunately you need a new one.
FIX. Buy yourself a replacement and swap them like for like. After this you will need an OBD II meter to reset the message. This won't fix the problem but should change the message to "Diese Exhaust Fluid Dosing Malfunction". After this take the car for a short country road drive, get the engine nice and warm and plug in your OBD II meter again and clean any messages. A short drive later and a few cycles through engine on/off and ignition on/off and you problem should be solved. &#x1f44d-1f3fb;.

5. Possible problem No 5.
EGR valve. If you have all the tell tail signs of an EGR valve fault (ruff running idle, white smoke out the back, so on.) don't worry you don't need a new one, not just yet. It might just be backed up with carbon. this is very unlikely with the XE as it has a filter before the EGR valve. Cleaning or replacing the filter if it is blocked would be a good idea
FIX. You could pay a professional to do a deep carbon clean on your drive, and this would do your car the power of good unlikely. Or, if you're brave enough you could remove you EGR valve and give it a good de carbon clean with an aerosol spray. Or you could just spray the same aerosol spray direct in to the air intake of your engine, this will eventually get to your EGR valve and clean it out this is not a good idea and could cause severe engine damage. After this you will need an OBD II meter to reset the message. This won't fix the problem but should change the message to "Diese Exhaust Fluid Dosing Malfunction". After this take the car for a short country road drive, get the engine nice and warm and plug in your OBD II meter again and clean any messages. A short drive later and a few cycles through engine on/off and ignition on/off and you problem should be solved. &#x1f44d-1f3fb;.

In all of these cases, you've probably noticed that you'll need an OBD II meter. In some cases you might even find that the problem on your car is non existent or no longer existent. But one the ECU gets a sniff of the issue, EU law says that these new Euro6 super eco engines have to remain eco friendly, FOREVER!!!! So the problem HAS to be fixed, weather it's a simple fix or not. Either way, the FIX is with a cheap OBD II meter to clear the baddy message, then take the car for a "drive cycle" this should do it. &#x1f44d-1f3fb;

Are you sure a basic OBD II reader can reset adblue faults? I would like someone to confirm this as previous posts on the forum suggested they could not and a Jaguar specific reader was required. Sometimes with the Adblue faults, performing one of the resolutions can also allow the system to clear the error when it realises it is functioning correctly again just don't let the mileage go to zero

If you've got any questions on any of these processes, drop me a message. I'll do my upmost to help. Potentially saving you £££££ 😘 Mike.

See above for comments in bold. Some points are incorrect and some need further clarification.

 

Mileage countdown Came on the other day swiftly followed by engine warning light after a quick visit to local indie No1 glow plug identified as faulty. I changed this 1 night, popped in to garage & all reset but left with countdown. However within a mile this went but as I pulled up at home DEF low warning light appeared this was last filled in October.Now got countdown back so got under car & pipework Leaking near to part that fits on injector. Does anyone know part No for supply pipe ?
Thanks

 

Should of also put the car is 2016 2.0 AWD portfolio x760 ?

 

Thank you so much for these instructions

I have cleaned out my injector today, it was almost full of white crud, as was the opening to the converter

I am struggling to reset the fault code - I have a OBD2 reader, I have tried multiple android apps and none of them show a fault

Is it a case of just running the car for a few days or do you NEED to clear the code? If its the latter, any idea what I am doing wrong? If anyone has managed to clear this specific issue using a OBD2 can you share the adaptor and app used to do it please?

Thank you in advance

 

Hi guys,
Just wanted to say that I had the "Diesel Exhaust Fluid Dosing Malfunction" message a couple of weeks ago, accompanied by the abler check engine light and DTC U029E. The check engine light came on a few hundred miles (500-800miles) and about 24h before the DEF message (I was driving through Europe). After wasting a quite few hours to several garages (on different occasions) who would only put the diagnostics tool on the car and try to delete the error, I decided to have a look myself. Of course, the technicians could not figure out the fault or remove the "No Engine Restarts" message, so I paid them for nothing (they could delete the U029E code but it came back after exactly 3 engine restarts).
I got under the car and found the wiring harness of the NOx sensor (C2D55027) disconnected (unplugged). I clipped that back in and deleted the U029E error with a cheap ELM327 OBD scanner (Car Scanner app), drove over 1,500 miles since and everything is fine. I hope this helps.

 

How to get the countdown message to go away? I can't seem to find the control for this. I tried autell,and a Bluetooth app mx8.

 

Hi Mike

Thanks for the great post!

When I hooked up the car to my diagnostic tool it's not showing a fault but friend of mine says it's buried in the menus somewhere.

Do you know where exactly I need to navigate to in order to clear the fault?

Thanks

Tim

 

Hi Tim

Thanks for your kind words.

I only used a very cheap OBD scanner, but it was very simple to use and find the fault codes.

 

Thank you for the information provided. I had a lot of issues with this when my car was under warranty and thought it was finally solved a couple of years ago when Jaguar did a thorough check and changed the DEF injector and catalytic converter (at least that is what they say they did)

The incorrect DEF quality message appeared again last week (so two years on).
I took it to my local mechanic who took off the DEF injector and cleaned out the crystals that were filling it up.
He reinstalled it and reset the error messages, but was left with the dosing error message and 500 odd miles to go before no restarts.
He was unsure how to proceed so I took the car home.
After reading this post, I decided to buy a cheap OBD2 meter which I ordered click and collect.
On my way home from picking it up, the error code cleared and has stayed clear.
I had driven about 15-20 miles.
I haven't yet tested if the cheap OBD2 meter would have worked with clearing any messages.

My conclusion (with no Jaguar or other formal information) is that the DEF injector clogs up over time and the engine management system has to increase the dosing to try and keep NOX readings in specification.
Eventually enough DEF can't get through and the DEF quality error is posted.
The DEF injector is cleaned, after which the dosing is not immediately correct, but over the course of those 15-20 miles of driving, the management system adjusts itself and the fault clears.

So just posting to confirm that sometimes this error can be relatively cheap to fix as per the original post scenarios.

 

Not quite - The error appears on the screen as a fluid QUALITY issue - Once the job has been completed error codes are cleared down using a cheap code reader (even if it shows no codes, use the clear codes function. Once that has been done the error message looks almost identical, except the word Quality changes to DOSING malfunction. From that point onwards the car needs to be driven a few, to 20 miles, and then it will disappear off the screen. So sounds like the mechanic had cleared the codes, just not done the driving bit - which you went on to do..

 

Hi Mike
I now have the same problem.
Is there an OBD ii meter you would recommend, as the prices vary wildly.
Many thanks for your very clear explanation about how to clear problem.
Regards
Steve

 

When I asked the same question on forums I was told "make sure you can get one that can clear emisión faults."

Hope this helps.

 

I got under the car and found the wiring harness of the NOx sensor (C2D55027) disconnected (unplugged). I clipped that back in and deleted the U029E error with a cheap ELM327 OBD scanner (Car Scanner app), drove over 1,500 miles since and everything is fine. I hope this helps.

Where is this wiring harness located exactly? Can you describe it or take a picture? My XE is showing the error every now and then for almost a year, never got in lamemode though. Im sure its something with the NOx sensor rather then the egr valve.

 

Hi Sikz,
Apologies for the late reply, I have not been on the forum over the last weeks.
I finally found a clear picture of the component location after searching my computer for 30 minutes. Please see the picture and guide attached - the guide may not be applicable for you at this point.
To check the connection on your NOx sensor you will need to get under the car and undo a few bolts / clips which hold the undertray around the sensor area (3 or 4) and you will be able to see the connector and stick your hand in there to check it.
I replaced mine in 2018 and paid for it £139 to sort out P20EE. I found this to be C2D55027 which replaces C2D49888 and T4N4857.

 

Hi, thanks for the post. I'm trying to use an ODBII to reset the warning but none of them recognise an error code. I've tried 4 different versions. Is there a trick to getting it to recognize the code? Is it stored in a specific module? Any help on this would be appreciated.

 

Not all OBD readers will read every car make and if they do some will not do all codes. That was my dilema in looking to buy one last week. I have seen one that states it is suitable for Jaguar, a Vident iAuto 702 Pro on Ebay. The sellers are in my opinion all the same outfit based in China (returns to China only) sold from Leicester or Dunstable @ £135 ish . The fact that returns only to China put me of completely. Machine Mart do some at inflated prices, but I am not aware if they clear Jaguar fault codes.

 

Hi Fighterpilot
Under Ebay rules any item has to be returned to the location that it is listed in the sellers description, i.e. if they say location Leicester then it has to be returned there. Otherwise complain to Ebay and you will find they will authorise the item to be returned to the Uk location, I had a similar problem and Ebay instructed the seller to have the item to be returned to the UK Location listed on the sellers listing, Hope this helps.
Regards
foxy66

 

Hi Mike

I'm having the same recurring problems. Can I ask what type of OBD scanner you need to clear the fault code?

I have had mine in and they can't find a problem with it ad just clear the fault but it's getting expensive now.

Thanks!

 

Thanks for all the useful infos that have been posted. My 2015 XE 2.0d came up with this message eight weeks ago, shortly after I had topped it up with AdBlue. I emptied the whole cannister of AdBlue, possibly overfilling.
Had a dealer take a look and he performed a reset, removing the error message. Half expecting the message to reappear quite soon (and possibly needing to have a repair carried out) it has completely disappeared and all seems to be well. I think I will try to avoid overfilling next time and try the reset myself with an OBD2 android ios wifi scanner as a first step if it recurs.

 

To avoid overfilling get hold of the more expensive bottle (about 1.8 Ltrs) and use that to top up. They stop over filling as just the right amount is dispensed. I have a Redex one which I top up and reuse. I never let the Adblue run down and top up either weekly or monthly depending on the journeys I do. 6 years on and no problems so far ( I have repeated myself again but it's how I have always done it)

 

So what do we think the average consumption of adblue is on the new engines? I think I read that it's approx a litre of adblue for every 500 miles, and that the adblue tank is 12 litres in size, is that correct?

 

The manual lists average consumption as 1l per 500miles and a 16l capacity.

 

Hey guys, can somebody clarify this statement from Jaguar XE MY2016 user manual:
"DEF can be added to the reservoir by using the top-up procedure; however, a full system refill is still recommended at the earliest opportunity."

Probably they want to say that it's better to change fluid completely in other to prevent mixing (potentially) older fluid in the tank with the topped one? Is my understanding correct?


Just to mention that this applies to MY2017 and upwards. For MY2016 it's "approximately 1 litre for every 1000 miles ", according to manual, but not sure is this wrong assessment or something really changed in fluid consumption from MY2017.

 

Cheers Rojo

 

I've had this warning 3 times now. The first time I booked the car in but just on a whim I plugged my Torque OBDII reader in and scanned for codes, it didn't show any but I pressed "CLEAR CODES" anyway. The warning then changed from quality to dosing error, then after 20+ miles, it all cleared. I thought this might have been a coincidence and canceled my garage appointment. The next time it happened it was after I had had a DEF level low warning and I had filled it up. This time I cleaned the injector (it had not crystals on it and was clean) and I ordered some DEF from Jaguar and was prepared to drain the tank. I decided to try the scan and clear again. It followed the same pattern of saying "NO FAULTS FOUND" on the scanner but I still clicked "CLEAR FAULT CODES". The car did the same thing, it changed from quality to dosing then 20+ miles of driving the warning disappeared. Then 6 months later, out of the blue, it comes on again. I waited for the miles count down, then did the same routine with my cheap OBD scanner and the waring cleared after 20+ miles. So for £20 for the scanner and full app, I've managed to clear the waring 3 times now.

I think the DEF system is so sensitive that something small can trigger a warning and it just needs a reset. If it then comes back in a day or so I would look into it, but I've had 6 months between mine or it was caused by a low DEF warning/refill that then set it off a few days later.

I hope this helps some of you.

 

Had the incorrect quality message come up on the dash on Monday morning, whilst travelling down from Leicestershire to Poole for a holiday in Jersey, message said about 540 miles before no engine restarts

My trusted OBD2 code reader, which I've had for a number of years, did not read the codes, nor clear them

Once settled in the hotel, I searched for this thread, as I remembered seeing it previously, after a quick read, a new code reader was purchased, and cleared the code, it then read about the dosing error, as stated in the opening post

After reading the possible causes, i decided that it would either be the old DEF (I don't do a lot of miles) or the dosing injector clogged, easiest to do in the hotel car park was the dosing injector, removed, rinsed with hot water, refitted

By this time, the mileage was down to around 360 miles

If anyone here knows Jersey (Channel Islands, not USA), it is pretty much impossible to go for a 'spirited drive' 🤣, so, about 5 miles at average 25 to 30mph, in 2nd gear (rare manual transmission) it was then

A short while later, the error message, and the Amber warning light disappeared

Happy days, and thank you to those who took the time to work this out, and post it on here