Good afternoon everyone, I've had a bit of a week with my Focus 2008 1.6 diesel.

Few issues I had was, cutting out struggling on hills and loss of power, changed fuel filter, sorted that.

I think the it was fuel pressure issues on the scan.

I then noticed the intercooler pipe had split, changed that, but then noticed the Dpf pressure sensor pipe was split, so changed both of those. I think the code was P2002

Using Forscan the dpf pressure sensor is measuring 0 kpa even when I increased the revs, stayed at 0. I unplugged the sensor and readings started to increase 🙄

When I changed the pipes, I replaced them from the positioning that I removed them, so hoping they are the correct way around. The one from the dpf metal pipe, nearest the front of the car, is connected to the sensor connector nearest the battery, I hope this is the correct location?

I have read somewhere, the sensor will not work it they're the wrong way around.

Does this mean that the dpf pressure is faulty??

I have tried finding what values should be, what I have found the kpa should be as low as possible?

As it doesn't increase with increased revs, my thoughts are the sensor itself 🤔

I have scanned and there are no fault codes, would this mean the sensor is working correctly?

I am not very well educated in cars, I have have just recently started to gather tools and educating myself to how to fix the smaller issues😬😂 rather than taking it to a garage.

I hope one of you very knowledgeable people out can point me to the right direction.

I appreciate any help or advice that is given, I thank you all in advance for any help or time also given with this matter.

Regards

Johnboy

Hi,

It's possible that someone deleted the DPF before you bought it. That would make 0kpa difference. Although usually the DPF fault codes would be mapped out when doing that.

The 2008's had an older type DPF that needed Eolys fluid. It wasn't particularly effective and was expected to be full of ash by around 75k miles, requiring replacement. So I suspect most ended up being deleted. From 2009 they switched to a coated DPF, not requiring any fluid, which was for more efficient and expected to last the life of the car.

For the cost of a sensor, it is cheap and easy enough to just swap that out before searching for more complex faults such as wiring etc.

Thanks for your quick reply 👍

I just checked the paperwork that came with the car. I have owned for more than 2years, it's got full service history stamped, until it became mine 😬😂

It had the Cat and Exhaust pressure sensor done in Aug 2020.

Got no mention of dpf delete, not saying it never happened, just got no record.

I will take your advice, grab a sensor, see if that makes a difference.

Do you think Forscan should get a reading higher than 0 kpa ? Or would it stay at that if it had a dpf delete?

Would Forscan show it had a delete?

Thanks

31 minutes ago, Johnboy4063 said:

Got no mention of dpf delete, not saying it never happened, just got no record.

Well, it is illegal, so not the sort of thing that tends to be recorded, lol.

But the cat is part of the DPF on these, so if that was replaced around 6 years ago then it is unlikely to have been deleted between then and now.

It also seems unlikely for a sensor to have broken so quickly. I am now wondering whether the pipes are still leaking. If they are not split then perhaps one of the connections is loose.

Does the invoice say which brand the cat & sensor were? I assume they weren't genuine Ford? Just seems very odd that you have another fault pointing towards DPF & sensor 6 years later.

To answer the questions though, when the DPF is fully deleted, the pressure differential will not rise above 0kpa. Forscan will not show a DPF delete.

Uploaded the invoice for the cat don't say brand.

The pipes were put on brand new and are tight.

Just did another quick scan including dpf soot load, dpf regen distance.

If the senor Was faulty, would it not show a distance for the regen ?

Thanks

Just to confirm there are no longer any error codes, my only concern was the 0 kpa reading, could this mean everything is as it should be, regen taking place and successful ?

45 minutes ago, Johnboy4063 said:

Just to confirm there are no longer any error codes, my only concern was the 0 kpa reading, could this mean everything is as it should be, regen taking place and successful ?

Maybe. I have never seen another DPF so clean at 6 years old though. There should be some ash build up by now. Every time soot is burnt in regen, it leaves a little ash behind.

That's a very expensive sensor, but oddly not genuine. The FAC means Facet branded. I don't know what the quality is like on those.

These have a failsafe regen built in every so many miles (say 500 miles) so even without a working sensor they will still regen eventually.

It might be worth swapping the pipes over, just in case someone refitted them the wrong way round before.

Just swapped the pipes, no difference 🙄 Last week I did a couple runs to the airport, 160 miles each, that should of cleaned a bit 😂😂

I googled the part for the sensor. It came up with a generic GSF supplied one. Probably not designed to last 🙄

Might Just go with your advice and get a new sensor, see if that does make a difference 🤞

Thanks Again

5 minutes ago, Johnboy4063 said:

Just swapped the pipes, no difference 🙄 Last week I did a couple runs to the airport, 160 miles each, that should of cleaned a bit 😂😂

I googled the part for the sensor. It came up with a generic GSF supplied one. Probably not designed to last 🙄

Might Just go with your advice and get a new sensor, see if that does make a difference 🤞

Thanks Again

Yeah it's weird. That's actually more expensive than a genuine Ford sensor.

https://www.ebay.co.uk/itm/393396316845

Personally I'd buy a good used one for around £20 instead - ideally from a seller who can confirm it works.

The genuine Ford one also shows which way the pipes go. It has Hi on one side and Ref on the other. Hi is the top pipe on the DPF, Reference is the bottom one.

P2002 will almost certainly return after a set number of miles without any pressure showing above 0kPa.

Thanks, Just ordered one from Amazon about £15 😬 reviews says it works 😂😂

As for the pipes, that is how I've got them.

If there is no change, I can just return it, run the car until if or when the P2002 code returns, get a genuine Ford one. Go from there. See what happens.

I don't recall seeing the P2002 before when I had to scan, not until I had to change the intercooler pipe this week, that is why I inspected those pipes.

Thanks again for your help and advice, I appreciate it.