Dpf full xj358 2.7 2007

[alamn2]

My jag displaying the DPF full and limp mode ( btw it passed its mot with a full dpf, the smoke test was clean )

What’s better option:

Get deep clean with detergent then regen (£380)

Get a regen forced (££80-£140)

Get a delete and removal (£400-£500) Iv been told was not mandatory till 2009 so not legal requirement to have dpf pre 2009 .. it’s my least favourite option but a more permanent fix

Buy a capable obd tool to do it myself ( please recommend a tool that will work on the 2007 model )

[PaulGover]

You may have been told that you can remove the DPF, but that's wrong; removing it should result in an automatic MOT fail. Using a car with its DPF removed could get a fine of £1000, according to what's apparently a gov.uk blog.

Of the various options:

Normally you don't need an ODB device to enter the default DPF cleaning cycle - the car will do it automatically if you drive in the right manner: if you've been doing a lot of short journeys recently and the light has only just come up, and assuming you're near a decent stretch of motorway or unbroken dual carriageway, you can probably clear the DPF warning by following the handbook, and drive for 20 minutes continuously above 50mph - I strongly recommend using cruise control if possible, as I suspect taking you foot right off the pedal "resets" the timer and the I believe the ECU considers the DPF clear cycle to have been aborted. I also recommend using a tankful of Shell V-power diesel; "Honest John" reckons it's got the best engine cleaning additives, and it worked for me in this situation. Of cource, at today's prices, a tankful of V-power will be about £160. ...

That said, as you are in Limp Home mode, you probably can't achieve that, so you're down to the forced clean options. (You might be able to achieve the necessary speed - I've been in Limp Home due to a faulty speed sensor - I found if you keep the engine below 2000 rpm by accelerating very gently you can reach 70 mph, though it takes about a minute rather than the usual 15 seconds or so! However, whether the DPF cycle will run in limp home is a different story.)

If the DPF light has been on for some time but you have been doing long journeys, it might be worth finding a garage to check the fault codes and the DPF system. The way it detects the blocked DPF is with a pressure sensor either side of the DPF - if the difference is too high, the DPF is blocked. So perhaps a faulty sensor could trigger the warning.

I've no experience with the DPF washing services.

My DPF blocked soon after I first bought my car second hand (I suspect too many short sales trips), and AFAIR I took it to the local Jaguar agent who did the forced regen. I think it cleared the DPF temporarily; after the light returned I happened to do a couple of 100 mile runs, which cleared it, never to return.