I have had an issue with my actuator recently which has caused my DPF not to regenerate due to limp mode. Now my DPF is red. I have taken it to Halfords for a 'deep clean' but they say it is blocked. Can I take the DPF off and give it a clean myself or is that not practical/possible?

 

I wouldn't go to Halfords, I'd go to a Jaguar independant, or at a push a Jag agent.

There is a forced regeneration routine, which requires Jaguar SDD software and suitable connection lead, that can be performed when a 'red' comes up for the DPF, but it's not certain that will unblock it if it's too far gone.

Alternatively there are companies that will clean DPFs. Some may even offer a service to remove and refit the DPF for you as well.

 

Check your engine oil has not risen. Change oil without driving the car if it has.

 

That won't clear a blocked DPF 'though.

The ECU should throw up a 'Service Due in X miles' alarm if there have been, or shortly will be, the maximum number of regeneration burns/oil dilutions.

A blocked DPF is detected from 'before' and 'after' pressure sensors in the exhaust system.

 

It is to save the engine from destruction. Rather more important.

 

Rather depends when the oil was last changed. No point if it's only 1 or 2,000 since the last change. DPFs aren't cleared just because the oil is changed, they can block at any time.

As I said, the engine management unit keeps a count of the number of regen burns, failed or successful, and should give an alarm when 7% dilution is approaching.

If you don't trust it then as you say, at the oil change only fill to half way up the dipstick. If it subsequently approaches the high mark then it's time to change the oil. From halfway to full is +0.5 L into 6L which is ~8% dilution.

 

"should" - only if the car has the hardware and updated software and it's working.

You can read on here & the UK site & web searches that this has failed for some owners, with engine destruction the result.

 

All I'm saying is that there's no logical reason to change the oil just because you get a 'red' DPF full alarm which is what you seemed to imply inyour original post.

If you did nothing but urban stop/start running you could get a yellow, (progressing to a red if you don't do a regen run) at the first regen after a service ie within first 200-300 miles.

DPF full alarms and Oil Dilution alarms don't go together.

I had a 'Service in X Miles' 2,500 miles / 10 months after the a service, (in fact I'm sure because the Jag agent hadn't reset the service counter because the oil level hadn't risen at all). However I didn't get any DPF full alams at all, yellow or red.

In fact in five years I've never had any DPF regen alarm at all because I don't do any short or urban running in it.

 

Not so - I put to change it if it has risen.

It's vital not to leave diesel in the engine oil.

I never said that DPF full and diesel dilution must go together - though they have for far too many owners to their enormous cost.