[Lucifer01]

I have an 07 E92 335d 96k, DPF light came on tuesday (CC ID 49) and I didn't have chance to try and blast it out until this morning. No luck unfortunately after 20 minutes at 3500 rpm. Im tempted to see if I can get the code reset and see if it still comes back on as im not sure if it would reset itself?

I have a local garage who specialist in DPF cleaning for about £200? Has anyone done this etc? Any experiences?

I also have a good local tuning garage who could delete the DPF? Ive not got a quote yet but I understand its about £4-500? Now ive only heard good things about the performance side from doing this but I understand it creates quite a unique sound?

I understand the legality issues behind removing the DPF so please dont tell me its illegal.

Any advice is appreciated, thanks in advance.

[salimshk]

I've had my dpf deleted. Can't say I've noticed any difference in sound. Performance seems to be around the same aswell (it was mapped prior to the DPF removal anyway). MPG increased slightly. Only downside is that the exhaust tips are black within a day.

[E60525d]

You need to investigate why the DPF is not regenning. Have you checked your thermostats and any glow plug codes?

In my experience, the DPF can always be sorted by a regen and have done on several cars.

Recently done on my mates 525d with 160k on the clock. Done a DPF test on DIS and the values were over double on the allowed limit. His EGR thermostat was faulty.

Changed it, put DPF cleaner in tank, forced DPF regen via DIS, took for 45 min drive and all fixed.

Done a DPF test again and this time the values were a fraction of the allowed limits.

Only cost was a thermostat and £5 bottle of DPF cleaner.

[sirleeofroy]

Originally Posted by E60525d

You need to investigate why the DPF is not regenning. Have you checked your thermostats and any glow plug codes?

In my experience, the DPF can always be sorted by a regen and have done on several cars.

Recently done on my mates 525d with 160k on the clock. Done a DPF test on DIS and the values were over double on the allowed limit. His EGR thermostat was faulty.

Changed it, put DPF cleaner in tank, forced DPF regen via DIS, took for 45 min drive and all fixed.

Done a DPF test again and this time the values were a fraction of the allowed limits.

Only cost was a thermostat and £5 bottle of DPF cleaner.

Yeah any glow plug/controller faults will stop the DPF from automatically regenerating. I actually have this issue now but you can still force a regen using Carly.

[E60525d]

Originally Posted by sirleeofroy

Yeah any glow plug/controller faults will stop the DPF from automatically regenerating. I actually have this issue now but you can still force a regen using Carly.

I see that also you have a LCI 330d so N57. Which glow plug code have you got?

I had a glow plug controller error code for a few months, the engine was running a little rough for about 10 seconds on cold startup. But surprisingly the DPF was still regenning.

[sirleeofroy]

Originally Posted by E60525d

I see that also you have a LCI 330d so N57. Which glow plug code have you got?

I had a glow plug controller error code for a few months, the engine was running a little rough for about 10 seconds on cold startup. But surprisingly the DPF was still regenning.

I don't have the codes to hand right now but there are a couple to indicate the controller is at fault. I read somewhere that having more than 2-3 glow plug/controller faults results in the DPF not regenerating, now I'm not sure how true that is but it certainly seems to be the case for me as I monitored my soot and ash levels for a few weeks. I had done a number of long runs on the motorway and it didn't regen on its own but once I'd requested it in Carly, my levels halved.

Thing is, the car starts and runs fine, you'd never know there was a potential fault. That said, I do have another controller to install and I'll be doing that when I take the IM and EGR off for a good clean.

[russ9898]

Clean every time, from what i've read the MOT rules around DPF's are likely to change next year and will require more than the current visual inspection.

[Maxlude]

When I started having issues with my DPF a few years ago, my mechanic mate that looks after my car when I cannot, said that I could legally delete it as mine was a MY2006, but I decided to resolve all the issues as although I like the diesel torque and economy, I wouldn't want to be chucking out loads of soot when I myself don't like breathing it in.
If you clean the DPF without resolving what is causing it to block then it will just block up again.
Thus you will need to fix it anyway unless you delete it.
I sorted all the issues with my DPF.
I'm on 127K miles and it runs at: 5-8mb at idle, 25-45mb at 2.4krpms now.
Compared to when it was blocked: 65+mb at idle, 250+mb at 2.4krpms!

[MrSweet1991]

Deleting the DPF gives you piece of mind in some sense, while present there's many things that can prevent regening (temperature, glow plugs, rpm) its very likely you'll hear the spool noise from the turbo a lot louder when removed. MPG may also increase a bit and you don't need to worry so much in doing short journeys..

However, if it was my choice I'd advice against it. The odds are if you was ever in a position where the insurance company "may" look into things like this then the chances are there's been casualties. From research I've seen people who stated they've worked or still work for insurance companies and they're not familiar with them carrying out inspections on DPF's but as I say it's when your in a really bad situation that they may look into it and it's worth imagining yourself in that position and seeing if it's worth while.

What I'd do instead is get it cleaned and really crack down on learning about your car. So once step would be getting to yourself a Carly OBD adapter and with that alone you can check if any faults are present and also read your DPF values. With a little research into what affects regeneration and what are good/bad and warning figures for your DPF you'll very likely prevent any future DPF issues.

I don't know a lot about DPFs but from what I've read some ohf the things the prevent DPF regeneration don't actually present a visual error on your dash. Take for example your thermostats are shot and don't go higher than 70 degrees your dpf just starts to get more and more blocked increasing back pressure.. Same if one glow plug how's out, that I'm sure prevents a regen but again you wouldn't get a warning. So as I say I'd get a diagnostic software and OBD and keep on top of it, when something is wrong you'll already be on top of it.

[Lucifer01]

Originally Posted by sirleeofroy

Yeah any glow plug/controller faults will stop the DPF from automatically regenerating. I actually have this issue now but you can still force a regen using Carly.

This was the case it turns out! Got my father in law to reset the glow plug fault code saturday morning and no light since. Its in for its service in the next 2 weeks anyway so will get them done.

Thanks for all the advice everyone however!

[usey123943]

hi guys, im hoping someone can help me

Recently my DPF light came on my dash.

i plugged in and INPA shows errors code 480A and 481A which are dpf fault and partial block. OK appreciate my tools are old, but if anyone has EASY dis or ISTA D it would be handy for me and would appreciate if someone could send me a link

What i also have noticed is that all 6 of my glow plugs are show glow plug activation interrupted errors, even though i clear the fault codes after a short while the dpf codes occur.

but i have no power loss at all, theres no limit to the revs the car drives fine.

i dont know how to check all the conditions to ensure dpf regen occurs. but any help and guidance would be handy

[usey123943]

inpa showed the below errors for me also

4212 error =04
4222
4232
4242
4252
4262

INPA codes

4212 = glow plug CYL 1 -activation interrupted

[Sensible_]

Originally Posted by usey123943

hi guys, im hoping someone can help me

Recently my DPF light came on my dash.

i plugged in and INPA shows errors code 480A and 481A which are dpf fault and partial block. OK appreciate my tools are old, but if anyone has EASY dis or ISTA D it would be handy for me and would appreciate if someone could send me a link

What i also have noticed is that all 6 of my glow plugs are show glow plug activation interrupted errors, even though i clear the fault codes after a short while the dpf codes occur.

but i have no power loss at all, theres no limit to the revs the car drives fine.

i dont know how to check all the conditions to ensure dpf regen occurs. but any help and guidance would be handy

What car do you have?
What engine do you have?

You need to investigate why the DPF is not regenerating.

Number 1 to check is your coolant temp. It much reach above 75c. Check using diagnostic equipment or secret menu in the cluster. If it doesn't then change thermostats.

Have more than 10l of fuel in the tank.

No DDE faults. (I think glow plug faults won't effect regeneration. However you should replace your glow plugs and glow plug controller.

Exhaust gas temps need to be hot aswell.

If all the above is ok, then take the car for a looooong drive on a motorway. Travel at a constant speed above 60kph.

Once all the above conditions are met, the ECU should start a regeneration. You shouldn't actually need to 'force regen' as the ecu should do it, even with your DPF fault codes.

However, you can use ISTA D to force a regen if you wish.