DPF full

[Jaguarjoe]

Hey. Hope everyone is well and can help me out with this query 

I’ve a 2012 Jag xf 3.0d s portolio, 85k on the clock 

today and for the first time I for a DPF full message. I took it a fast drive and the warning has cleared 

 

just wondering whether I should add a redex dpf cleaner additive to the fuel, or has it all been fixed now?  Thansk 

[Leo]

We always used premium diesel when we had the XF-S, and did at least one 30 mile trip a month.

This was enough to keep regenerations pretty rare, and we never had any DPF warning.

We have done the same with my wife’s Citroen, and again never had any DPF warning in the 3 years we have had it.

[Mollbhan]

A DPF full message is not good news, I don't think a completely full DPF can be cleaned, a red-ex or similar treatment would definitely be worth a try and I would do it before the warning apears again.

[SamsXF]

My 2010 XF 3L Diesel PL had 'DPF full' message today. 74k on the clock, its now well over due a service by 4k.

I put redex dpf cleaner on empty and filled up with premium diesel. Took it for a 70 mile drive on the motorway in sport mode, keeping revs high around 1.7 to 2.2. I think its in limp mode, very sluggish and I don't think the turbos where activating at all. 

After the drive I reset the car by double locking but DPF full message is still there. 

Im going to book a service tomorrow because I'm now worried, 

 

 

[Old Peter]

Welcome to the club, Sam.

I don't do a big mileage nowadays, but I have never had the DPF full message.  I do put in an additive every time I fill up with premium fuel and give my s type 2.7D a good run once a month  --  a bit difficult under the covid19 discipline.

I think you are quite correct in thinking about the turbos, but another guess is the EGR valves which also might need a clear out.

Having an annual service is one of the things you should never miss so good luck!

Regards,

Peter. 

[SamsXF]

Thanks Peter, unfortunately I can't get a service until next Monday. 

Would it still be safe to drive for a week in limp mode without causing expensive damage? 

[Leo]

Sam, I wouldn’t be driving it if the DPF Full warning is showing. It could be potentially dangerous if you end up with Oil in the diesel, and potentially revving out of control.

[Old Peter]

Hi Sam,

I would agree with David.

When the DPF is full the system will try to clear it and will take some diesel Oil to boost the attempt. The Oil will run into the engine if not used, and it has been known [quite rarely]  to keep the engine running even when the ignition is switched off.

Regards 

Peter.

[IanL]

On 11/23/2020 at 8:38 AM, Old Peter said:

I think you are quite correct in thinking about the turbos, but another guess is the EGR valves which also might need a clear out.

I would be surprised if this was an EGR problem as DPF and EGR are mutually exclusive - one or the other

 

[SamsXF]

Hi all, just to update. My xf has had a full service by a a jag specialist. There is apparently 35g of soot in the filter. He cleared the red DPF warning and I was left with an amber DPF warning He advised me to drive for at least 20mins above 60mph. I did this and it has disappeared and is driving fine. 

Its ironic everyone was advising me not to drive the car when it was driving that fixed it! 

 

[Leo]

35 minutes ago, SamsXF said:

Hi all, just to update. My xf has had a full service by a a jag specialist. There is apparently 35g of soot in the filter. He cleared the red DPF warning and I was left with an amber DPF warning He advised me to drive for at least 20mins above 60mph. I did this and it has disappeared and is driving fine. 

Its ironic everyone was advising me not to drive the car when it was driving that fixed it! 

 

That’s great!

When the DPF is full it can result in diesel getting into the Oil. This can take the Oil above the “full” level, and the engine can then run on that Oil. That doesn’t mean run at tickover:  It can rev out of control until it either runs out of fuel, or until the engine  bursts

There  was a  guy on a Jaguar forum had  this happen to him in his XJ on a  motorway. It accelerated  out  of control to over 120mph despite him braking, and he had to put it in neutral and let it destroy the engine. Obviously dangerous and potentially life  threatening.

I am sure it is rare, but it made an impression on me!

 

 

[Shane Evans]

Hi,

I was about to embark on a long motorway drive when the DPF full message came on and I was obviously concerned whether it was safe or not to continue on a long journey. It was fortunate that  had to pass my usual garage that has looked after my cars for many years. I called in and he advised me to 'give it a blast down the motorway.' I did a 150 mile round journey which was mostly motorway and it cleared the message.  Hasn't happened since thankfully. I think it may have been that due to lockdown I wasn't doing the miles I normally do although you guys may advise me differently.

[Old Peter]

Hi Shsne,

I have never had the DPF message showing on my S type.  Advice by a very good  mechanic  assisted .  I was told to use an additive as well as premium fuel and to make sure I took the car for a run for about an hour once a month trying to keep the speed over 45 mph and using the manual gear changer to keep the revs up if necessary --   3rd gear can give you the right revs if you are in slower traffic.

Lockdown has been a nuisance, but I  try to do about 30 miles on the A38 [dual carriageway] at least once a fortnight.  The M52 would be useful.

Regards,

Peter.

[Shane Evans]

Thanks Peter,

                         seems like a few more runs are required and I'll definitely try an additive..Thanks again.

[Old Peter]

Hi Shane,

You will have the same engine as in my s type.  I use Millers Oils:  Diesel Power ECO MAX.  There are several other good additives also.

Peter.

[Shane Evans]

Cheers Peter, I'll look out for that..thanks.

[Jon Hyde]

Hi Peter,

You have my respect as a calming influence on all of the "OMG it's a risky buy" when considering a secondhand Jaguar

Little bit of history...

Back in 1983, I made the biggest mistake ever and bought an 4.2l XJ6, which did 6mpg and only one fuel tank that worked). WTB said "That has to go!", so bought a Ford Capri JPS. (Black, Gold stripes, gold seats; you get the picture!)

History has furnished me with some lovely and some not so lovely cars, but I've never lost my joy of driving.

However, while I always listen to your sage-like advice, I've recently swapped from Millers to Wynns. It seems to make the running smoother, and certainly more responsive.

Happy bank holidays! And thank you so much for your insight (also applies to others, too numerous to mention)

[Old Peter]

Hi Jon,

Thanks for the kind words. 

I also had a disaster or two with a car. My first car was a Triumph Herald which was a dream to drive and it was great for 18 months when the chassis rusted so badly that I had it towed to the council scrap yard --  I did strip it down and sold  much of it,  I then bought an Austin A40 which would do 65 mph with the wind behind, which I kept until I saw an Austin 1100.  The exhaust fell off when I was driving it home  -- a year later the engine blew and I had to replace it for £90.  It rewarded me for another  3 months of perfect driving till a Butcher from Edale managed to drive into me and write off the car completely.  There were no witnesses so the Police who came were unable to charge him.  I just sued him and managed to get £250 which in 1971 was not too bad - I bought a colour TV with the cash!  Then I started 29 years of company cars - Ford Escorts then Austins then Rovers.  Then came 21 years of retirement  with a Rover Sterling and after that two Jaguars -- 3 cars and not anything to worry about! 

We are now in a lockdown, so Netflix gets some use.  I hope you are keeping out of the way of Covid 19.

Regards,

Peter.

[Jon Hyde]

Hi Peter,

Car History...

Ford Anglia 1200 (cost £110, was a 1965, bought in 1973)
Sunbeam Stiletto
Ford Cortina 1600E
Triumph 1300TC
Ford Zodiac
Ford Zodiac again
Jaguar XJ6 (nightmare)
Ford Capri JPS
(Wedding - 1983)
Vauxhall Cavalier
From then, company cars all the way...
Renault 18
Ford Escort Mk3
Vauxhall Astra GTE (got me a ban for speeding)
Nissan SX
Vauxhall Calibra
Vauxhall Calibra turbo 4WD
Subaru Imprezza turbo
Lexus IS200
Lexus IS200 again
Renault Laguna
Renault Laguna again
Citroen DS5
Mercedes A220D
Bought my beloved XF-S two years ago

Has been mostly fun!

Cheers,
J

[Old Peter]

Hi Jon,

That is a fine record!

I had three motorbikes before cars.  My Triumph 500cc with sidecar exploded on the Preston Bypass which is now called the M6. This was in June 1964, and the first time I took a young lady out in the sidecar.  I had to get a taxi home and then I borrowed my Dad's scooter to take the young lady home to Liverpool at 330am! We were married in 1967 and the motorbikes were ended!  We are still married!

Regards,

Peter.

[Jon Hyde]

Maybe we need a new topic... Our car history / how we got to here?

J

[Old Peter]

 Maybe so, Jon. Worth trying.

Peter.