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I’m looking for a bit of advice please.
I have a 2020 NP300 which has 23k on the clock. I bought it with 7k on the clock last August and since then I have been into the dealership 4 times with the DPF light coming on and it cutting all the power.

Everytime I go in they say the same thing that Nissan know they have a problem with the DPF but all they can do is an oil change and re-gen.

Has anyone had the same problem where they are in the dealership every 2 months? If so how did you sort it or should I be looking at Nissan just buying the car back from me??
 

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Several have had this issue. An example here

I haven't heard of a resolution. It might be worth raising a case with Nissan Customer Services.
 

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Not much help to you, but I can 'black cat' your woes.
A while ago my son bought a cheap 2015 Isuzu Blade, the previous owner sold it as he was at his wits end with it regenerating every 30 miles, YES that is correct every 30 miles!!
It did not matter whether this was town driving, or a 200 mile trip to Devon, it did the same, EVERY 30 miles regardless, oil dilution was a big, big problem needing oil changes every 1500 miles!
I spent weekend after weekend working on it, could find absolutely nothing wrong with it, we spent hours 'online' only to find hundreds and hundreds of the same model with exactly the same defect worldwide, in desperation he took it to an Isuzu dealer for a 'diagnostic' and they found absolutely nothing wrong with it.
There were no software upgrades or changes that could be made to it.
BUT a mechanic there took him aside, and did say Isuzu KNEW of this inbuilt, inherent fault, could NOT fix it and he was stuck with it!
He asked me what to do, I reasoned that the only remedy was to completely gut the DPF and get it deleted from the ECU, he was worried about MOT's in the future, I said, "I can't see a problem, at the moment it's visual, and with the impending death of diesels, I can't see any changes being made to the MOT standards that will cost beleaguered garages thousands to implement with new testing gear having to be purchased and introduced".
So that is what we did, gutted the DPF, and found a 'friendly' ECU mapper, he had never 'done' one of these before, but he was brilliant, it took him three goes to get it right, but he saw it as a challenge and finally succeeded, the truck now runs better than ever, and of course no longer needs the expensive C1 oil!
DPF's were a knee jerk reaction to legislation, very badly thought out, and even worse with their construction and implementation, how can a device that actually uses MORE fuel to function be environmentally friendly?
 

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Yep, I've had the issue, but only once - again at around 7k miles.

Not sure of advice, but some have recommended running DPF cleaners in your fuel which might help.

Some reckon its down to dodgy sensors - I know of some aussies that have replaced the DPF sensors for a few hundred bucks, but its not too apparent if that actually fixes the issues or ignores it. Others have found broken sensor wires causing the issue which Nissan dealerships didn't pick up.

I'm no expert, but if it was mine I'd probably get a second opinion/check from a non-dealer garage first - even more so considering that they can't attempt to figure it out after 4 tries.
 

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I have a 2021 Nguard and have now rejected it, Nissan now admit there is no solution 10k and third time in dealers, Nissan customer service is totally useless so if no solution this week its the ombudsman..
Hi
I have a 2021 Nguard and mine is in the dealers for a second time with 8000 miles
How did you get on with your complaint ?
Have Nissan come back with any solutions to fix the problem ?
Did you get in touch with the ombudsman ?
Sorry for all the questions but I have now been told I have to pay for a regen
Thanks for any advise
Regards
 

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Hi,
My 2020 N-Guard has been back to a dealer twice, at around 8,000 miles and 16,000 miles, having had the RAC out to it both times. I expect it's the same with everyone else - the engine management light comes on with the fault code P253F Engine Oil Dilution (Engine Oil Deteriorated), soon after followed by the DPF light coming on, and the subsequent "limp mode". Now, at 19,000 miles, it's back on again. So I'll be e-mailing the dealership from where I purchased the truck, as this is getting stupid. I wonder whether there will be a class action, similar to that taken against Toyota in Australia regarding DPF issues.

I wonder if this is how they intend to kill off diesels, by making them infuriating and useless?
 

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Hi,
My 2020 N-Guard has been back to a dealer twice, at around 8,000 miles and 16,000 miles, having had the RAC out to it both times. I expect it's the same with everyone else - the engine management light comes on with the fault code P253F Engine Oil Dilution (Engine Oil Deteriorated), soon after followed by the DPF light coming on, and the subsequent "limp mode". Now, at 19,000 miles, it's back on again. So I'll be e-mailing the dealership from where I purchased the truck, as this is getting stupid. I wonder whether there will be a class action, similar to that taken against Toyota in Australia regarding DPF issues.

I wonder if this is how they intend to kill off diesels, by making them infuriating and useless?
Welcome to the forum.

This is quite a common issue. Not uncommon with other manufacturers too.

No, not trying to kill off diesels, just poor software from Nissan (and others too)

What is happening is that a dpf regeneration cycle does not complete fully.

As you probably know, the software decides to shove extra diesel into the engine to burn off the dpf deposits. If the cycle does not not complete that extra diesel ends up in the engine.

With the Navara discontinued, Nissan won't be making changes to the software to correct it.

Solutions to the problem...
Make sure you drive at motorway speeds for at least 30 minutes on a monthly basis. Can't say that always works

Trigger a regeneration manually monthly. Either using a garage or buy a £400 scan tool and do it yourself. Not ideal

I suggest you also:

Request a meeting with the service manager and explain (calmly) the problem. Take notes and write back to him/her using paper (old school).

Depending on the outcome you may wish to raise a case with Nissan customer services, but only if the dealership won't help.

No, there won't be a class action.
 

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Welcome to the forum.

This is quite a common issue. Not uncommon with other manufacturers too.

No, not trying to kill off diesels, just poor software from Nissan (and others too)

What is happening is that a dpf regeneration cycle does not complete fully.

As you probably know, the software decides to shove extra diesel into the engine to burn off the dpf deposits. If the cycle does not not complete that extra diesel ends up in the engine.

With the Navara discontinued, Nissan won't be making changes to the software to correct it.

Solutions to the problem...
Make sure you drive at motorway speeds for at least 30 minutes on a monthly basis. Can't say that always works

Trigger a regeneration manually monthly. Either using a garage or buy a £400 scan tool and do it yourself. Not ideal

I suggest you also:

Request a meeting with the service manager and explain (calmly) the problem. Take notes and write back to him/her using paper (old school).

Depending on the outcome you may wish to raise a case with Nissan customer services, but only if the dealership won't help.

No, there won't be a class action.
Hi,

Thanks for the welcome. Yes, I've been told by the supplying dealer that it's a software issue, which "Nissan are working very hard in the background to fix". If it was as severe with every other manufacturer, I'm sure that something would have been done across the board with manufacturers working together to solve the problem, or come up with a new system. In my opinion, the DPF system on the Navara is not fit for purpose.

It seems an odd suggestion that Nissan won't be making changes to the software to correct it. They can't just not fix the problem, irrespective of whether the Navara is discontinued. The supplying dealer told me yesterday that they have several in per day with this problem, and that some customers have been back ten or more times with it. All they have told me is to take it back to a dealer (to carry out a forced regeneration), but clearly that doesn't achieve anything.

Do you have any information that you can share which would back up your statement that categorically there won't be a class action? Because I might start it.
 

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Hi,

Thanks for the welcome. Yes, I've been told by the supplying dealer that it's a software issue, which "Nissan are working very hard in the background to fix". If it was as severe with every other manufacturer, I'm sure that something would have been done across the board with manufacturers working together to solve the problem, or come up with a new system. In my opinion, the DPF system on the Navara is not fit for purpose.

It seems an odd suggestion that Nissan won't be making changes to the software to correct it. They can't just not fix the problem, irrespective of whether the Navara is discontinued. The supplying dealer told me yesterday that they have several in per day with this problem, and that some customers have been back ten or more times with it. All they have told me is to take it back to a dealer (to carry out a forced regeneration), but clearly that doesn't achieve anything.

Do you have any information that you can share which would back up your statement that categorically there won't be a class action? Because I might start it.
Agreed, that dpf system is not for for purpose. As I said, not restricted to Nissan, try googling DPF issues, almost every town has several DPF specialists which tells you the scale of the issue.

I was maybe being a bit cynical that Nissan won't fix the software, but since the newest are over a year old, all they have to do is weather the storm for a few more years and the vehicles will be out of warranty. As above this is an issue with many car brands.

Class actions. The reasons I say there will not be a class action are:
  • they don't really exist in the UK, the test and opt in/opt out are nowhere near as straightforward as the US or Oz.
  • I can list dozens of examples of major issues with car engines over the last 20 years, the car manufacturers have managed in most cases to even avoid recalls...
  • Whirlpool tumble driers. Millions of pounds of property damage, some fatalities too. It took several years to even get a recall and I think there were only a couple of collective actions (aka class actions).
 

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IMO, it's not that Nissan, Isuzu and many others won't fix the DPF defects, it is that, they can't!
If it were as simple as a software upgrade, this would have been done years ago.
DPF's for the vast majority of drivers are just not suitable for their driving usage!
 
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Very true Chris. The Toyota solution (there was a class action in Oz) was to add a manual regen button, Basically you press it when you know you are going on long run. Simple but pretty effective.
That's all it needs, these are meant to be 'working trucks' when all said and done.
 

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Yeah that would definitely be the easy fix. I had one DPF issue but that was because I was doing too many short journeys in winter and the engine hardly got warm. Never had any issues since I moved and started doing minimum 20 min journeys.

Out of interest, I saw some DPF cleaning fluid being sold the other day - does it actually work? Wynns Diesel Particulate Filter Cleaner 325ml | Halfords UK
 

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Yeah that would definitely be the easy fix. I had one DPF issue but that was because I was doing too many short journeys in winter and the engine hardly got warm. Never had any issues since I moved and started doing minimum 20 min journeys.

Out of interest, I saw some DPF cleaning fluid being sold the other day - does it actually work? Wynns Diesel Particulate Filter Cleaner 325ml | Halfords UK
If I were you, I would steer clear of the DIY products from Halfords and similar.
If you need this sort of product I would go with: DPF Cleaner and Regenerator - Forté
Forte products tended to be trade only as they are a lot stronger than Wynns etc, these days enterprising sellers sell them on Ebay.
I have used Forte products for well over 40 years, can't say anything bad about Forte.
 

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I’m looking for a bit of advice please. I have a 2020 NP300 which has 23k on the clock. I bought it with 7k on the clock last August and since then I have been into the dealership 4 times with the DPF light coming on and it cutting all the power. Everytime I go in they say the same thing that Nissan know they have a problem with the DPF but all they can do is an oil change and re-gen. Has anyone had the same problem where they are in the dealership every 2 months? If so how did you sort it or should I be looking at Nissan just buying the car back from me??
I have the same issues with mine. My local dealership have been really good, but only able to help based on the advice Nissan give them. Mine now has done10800 miles (and has been in mulitple times for the isues you mention) and is currently in the garage awaiting a fix as it won't regen, even under workshop conditions. Nissan fitted new injectors at 7000 miles , vehicle was great for 2000 miles then problems started again. My vehicle is on a 2 year lease so luckily it goes back in 3 months! Meantime i have taken my case to the financial ombudsman as i thought the compensation Nissan offered me to be derisory.
 

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I’m looking for a bit of advice please.
I have a 2020 NP300 which has 23k on the clock. I bought it with 7k on the clock last August and since then I have been into the dealership 4 times with the DPF light coming on and it cutting all the power.

Everytime I go in they say the same thing that Nissan know they have a problem with the DPF but all they can do is an oil change and re-gen.

Has anyone had the same problem where they are in the dealership every 2 months? If so how did you sort it or should I be looking at Nissan just buying the car back from me??
Hi Matt,

How are you getting on with your truck now? I've posted my experience here. The latest is that I've been told by the supplying dealer to take it back to a Nissan dealer AGAIN, who they admit probably won't fix the issue, and to not drive it or I'm in danger of invalidating the warranty... Like you said, all I'm told is that Nissan are aware and are trying to fix the issue. As for the buy back option, the price they've offered leaves me a lot worse off when looking to replace the truck, even a two year old one which MIGHT have the same problem. I don't like the idea of suing, but it seems like that's what it's heading for.

Update:

Nissan Customer Services just called. They say that they are working on a software update and that they are close to a solution which should be ready "in a couple of weeks"... We shall see...
 

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I have a 2021 Nguard and have now rejected it, Nissan now admit there is no solution 10k and third time in dealers, Nissan customer service is totally useless so if no solution this week its the ombudsman..
Iam interested in your post we have a 69 plate nguard done 19k and it’s been in twice and is now going in again next week with the same dof issue ….I will be interested to see how you get on ..
 

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Hi I'm having same problem with my navara 69 plate had dpf and engine management lights come on 3 times this year it's been in for a re gen and 3 software updates I'm ****** off with it just got off the phone with nissan customer service because its happened again they had already opened a case I've just been told a solution is really close but basically I've got to go down and do another re gen for the time being it's a joke 😡
 

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I’ve got a 21 plate 21k N guard that’s been in for regen and apparently after complaining to Nissan customer service have been told they have applied the new software update that was released this week and gave me a £200 voucher off next service. I’m shocked at they quick response as I only complained this morning
 
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