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Exhaust Filter Full Red Warning after just 30,000 miles

17K views 47 replies 19 participants last post by  Coolcity 
#1 ·
Hi all,

I have a number of questions regarding the diesel exhaust filter.

I bought a second hand XFS 3.0 diesel a couple of months ago (16 plate) with about 27,000 on the clock. After around 3,000 miles, the red warning indicating a full exhaust filter has come on and the car entered "limp home mode". I have never seen an amber warning so am surprised it has gone straight to red. Surely that should have happened first? Also, should the filter get blocked after just 30,000 miles? Might this indicate another problem (perhaps a faulty sensor)? The car is still under warranty. Do I have to take it to a Jaguar dealership to protect the warranty or will an independent do? (my nearest dealer is an hour away). Any advice would be much appreciated as I need to get it back on the road asap!

Cheers,

Rich
 
#2 ·
I think you’re missing the point a little.

A DPF can become blocked very quickly, even from new, while doing lots of short journeys, so nothing to do with the car having 30k on the clock.

What sort of journeys have you done in 3000 miles? Town/motorway/A-roads?? You’ve either bought the wrong car for your usage, or you’ve bought someone else’s problem car.
 
#3 ·
It's just the DPF and needs a regen' which you can do yourself by going for a 30-minute blast on the motorway.
Alternatively, as it's still under warranty, take it into the dealer.
Unfortunately, a life of short journeys is bad news for a modern diesel.

Sent from my Nexus 10 and an XJ Portfolio. . . ☺
 
#9 ·
It will regen in RP mode. Been there.

Sent from my Nexus 10 and an XJ Portfolio. . . ☺
 
#10 ·
I'm not sure I am missing any point. My point was that I thought modern diesels are designed to regenerate themselves during normal operation and that, even if I had been doing lots of short journeys, I should have seen an amber warning before going straight to red. Once the red alarm has occurred, you are unable to instigate a regenerate by taking it for a fast run. Also, I have not being doing short runs. The shortest tends to be 90 minutes/80 miles of mostly motorway and the longer one is 3 hours/150 miles (again predominantly motorway. That is why I was surprised to see it go straight to a red warning and cam on here to ask for helpful advice.
 
#16 ·
Ahhh...OK. Dealers it is.
One thing, have you noticed any smoking from the tail pipe?
Mine does that, occasionally, with no warning lights at all.
 
#11 ·
Also, I forgot to mention, I was actually on a motorway at the time the alarm came on which, as it was after dealershis have closed, I continued to drive for a further 80 miles or so on the Motorway. I assumed it goes into limp home mode to protect the car from damage - is this not right?
 
#15 ·
With your pattern of useage you shouldn't be getting amber DPF warnings let alone red one. My driving pattern is similar to yours & I've never seen a DPF warning in over 200,000 miles.

The problem is either one of the differential pressure sensors or there's an underlying problem that's preventing the engine running in the emissions sweet spot. A leaking intercooler flange on mine reduced the regeneration cycle from 1000-1200 miles down to a couple of hundred miles or less. That gives some indication of how much more soot is produced by poor combustion.
 
#12 ·
Given your sort of motoring it is surprising this has happened. I can only assume the dpf was near full when you bought the car.
Maybe the previous owner did mainly short trips.
You need to get the car to someone who has the right testing gear to check it out and, if necessary, clean out the dpf.

Good luck.
 
#17 ·
Just thought I would give you an update on how my exhaust filter red warning has been resolved in case it happens to anyone else. Jaguar recovery came out to the car and found that the filter was not blocked at all (only 5%). It has done a regeneration about 100 miles ago but had not told the computer that it was done. The technical reset the computer an applied a software update and said it should not happen again, but if it does, just call them out again. In any event, the filter was clean.
 
#27 ·
Afternoon guys,

I got DPF filter full (Red light) followed by limp mode.
So I called out an amazingly help chap who specialised in DPF cleans and remaps.
He did some digging and said that on these 3.0 Jags and Evokes/discovery's etc when they fail to do a passive DPF clean (whilst driving it dumps additional fuel in to burn the soot) it purges the unburnt fuel into the engine oil. This is then measured and can be seen as a fuel to oil percentage in a diag tool field. When that value gets above a certain figure it trips the red light straight away rather than go to amber first. This value can be reset with a highend diag tool or a Jaguar garage. They should reset it along with the last serviced mileage at every oil change.
 
#19 ·
Thanks for the update. Always good to learn the outcome.

Sent from my Nexus 10 and an XJ Portfolio. . . ☺
 
#23 ·
And, your not safe with a new petrol Jag either! They've put an exhaust filter on that now.... So far in 1600 miles from new I've had 3 amber warnings and 1 red (today). With the petrol it only re-gen's below 50mph, low revs for 15 minutes but dont expect 4 warnings 2 months.
The 1600 miles have been a mixture of short journeys and I reckon ~1000+ miles motorway.
 
#24 ·
Similar problem to the OP. 3.0 diesel XF. Thanks for the help in this post. I rang the warranty people who told me to call out the Jaguar assistance.

Apparently there is a bit of a fault with the flap on the throttle body. It sticks and the air is drawn in via the EGR filling the DPF quickly. He replaced the throttle body, checked the software (it was up to date) and then we went for a run and he checked again. Soot down from 26 grams to 5 grams. Sorted.

Well impressed with Jaguar warranty and Jaguar assistance.
 
#46 ·
Does anybody know if this would cause a problem with regens? As some of you know, the issue I have is that a regen won't drop the soot level below 20 grams but we don't know why. Everything else we can think of is as it should be, no leaks, nothing.
 
#25 ·
Speaking of which,... My car's about to run out of warranty at 4 years old but only 14k odd miles. Any suggestions about renewing warranty... Jaguar dealer, independent or none?
All suggestions welcome.
 
#26 ·
Since nobody bothered to respond , I would go without and save the cash. Having had the XJ and X260 3.0 diesels most of the issues I experienced was through my own tinkering such as , broken wheel stud , decimated rear caliper The most expensive fix I had was a new throttle body on the XF which cost 600 euro including labour.
 
#32 ·
Not really.

Get the issue sorted by either your own two hands, getting some one to repair it at cost, or under warranty.

Then once that is done - drive the car once a week to give its 'lungs' a good clear out and prevent the DPF from clogging up.

I had two diesel XF 3.0L bi-turbos, never had any issues with the DPF directly.

The intercooler losing pressure by splitting on the first one threw up a warning, and was £600 to replace, but the car was far from troublesome.

Newer JLR products suffer from oil dilution as John says above, due to the DPF being too far away from the manifold, but the XF and XE don't suffer from this.
 
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#33 ·
When this happened on my 2.0D, it turned out that the upper DPF temperature sensor was loose and the bottom one had fallen out.
I tightened the top one and reinserted the bottom one. I also replaced the pressure differential sensor (£100 from Jag parts).
Subsequent run, using my Autel AP200 OBD reader / iPhone showed the correct temperatures had been obtained to allow the DPF to rejen and clear itself.
The run took about 20 mins at roughly constant 40mph. No need to thrash it, an 'Italian tuneup' doesn't do any good.

It's disappointing to have something like this happen, but the XF is not one of the affected platforms for the RED dpf issue, so be methodical and find the root cause of the problem, beacuse it's not the DPF.

Edit: one other thing, when the soot levels fell to the base percentage, the red DPF warning was still showing on the dash, it took a power cycle, to sort that. Leave it off for a minute or so and when it powers up, the warning should have gone.
 
#34 ·
Could be worth double checking what oil is being used when servicing your car and how often you are getting the oil changed - especially if the inferred oil dilution value is high (I think 8+ basically means change the oil!)

A good quality C1 oil at least twice a year is what I did and I never saw an amber or red DPF light/warning. Although, I did monitor the soot readings and go out on active regen runs myself...possibly to the demise of my crankshaft.
 
#42 ·
Believe me Conor, I've done you a favour re the Top Gun rubbish. ;)
 
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