Thousands Spent But Still A DPF Fault!? You Won't Believe The Cause! Peugeot Boxer

[dna]

Hhhhhhhhhhhhmmmmmmmmmmmmmmmm

Apologies for being late to the thread but my 2018 X290 van has recently started to display the outside temperature as way lower than reality. This started after one of the recently big storms and I presumed that water had got into the sensor / wiring somewhere and eventually this might dry out and return to nearer the truth.

I wasnt that concerned about this until reading mentions of this feeding into the DPF software etc.

Looking at this thread I now wonder if disconnecting the battery might cure this or if I should be looking to get the sensor replaced?

 

[Dramfineday]

Hhhhhhhhhhhhmmmmmmmmmmmmmmmm

Apologies for being late to the thread but my 2018 X290 van has recently started to display the outside temperature as way lower than reality. This started after one of the recently big storms and I presumed that water had got into the sensor / wiring somewhere and eventually this might dry out and return to nearer the truth.

I wasnt that concerned about this until reading mentions of this feeding into the DPF software etc.

Looking at this thread I now wonder if disconnecting the battery might cure this or if I should be looking to get the sensor replaced?

Ah Jimmy from O'Rileys... he's the man. One of his recent vids concerned a Renault that had dpf issues. The scan highlighted an issue with the external temp sensor despite which the temperature was displayed on the dash. Turns out the sensor was duff. Not a replacement sensor I'm afraid but a whole new mirror set.

 

[gus-lopez]

It came off the production line without a Cat or DPF fitted but is still classed as Euro 4,

my 2007 transit is similar.No dpf , an egr valve but no ecu connection , which is now blanked off & working perfectly after at least 4 replacements. a cat that also now has no innards. emissions as before & very low & euro 4.

 

[dna]

Ah Jimmy from O'Rileys... he's the man. One of his recent vids concerned a Renault that had dpf issues. The scan highlighted an issue with the external temp sensor despite which the temperature was displayed on the dash. Turns out the sensor was duff. Not a replacement sensor I'm afraid but a whole new mirror set.

not one of these to refit into the mirror (as mentioned above)

Pardon our interruption...

?

 

[Hettie's Crew]

not one of these to refit into the mirror (as mentioned above)

Pardon our interruption...

?

Just cut off the old sensor and replace with the eBay one. The O’Rileys thing is about genuine replacement parts, the mirror comes with the sensor in it, though it still wouldn’t stop someone stripping the mirror down to get at the sensor and replacing it.
My £9.99 eBay sensor sorted mine out and is still working.

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[dna]

Just cut off the old sensor and replace with the eBay one. The O’Rileys thing is about genuine replacement parts, the mirror comes with the sensor in it, though it still wouldn’t stop someone stripping the mirror down to get at the sensor and replacing it.
My £9.99 eBay sensor sorted mine out and is still working.

Ive tried searching YouTube and the internet generally but can only find mention of people replacing the whole mirror unit just to fix the sensor. That looks reasonably straight forwards to do but feels wrong to junk the whole unit for just the sensor.

Hettie's Crew, please would you say how you got access to the area where the sensor is to replace it? Did you have to remove the mirror from the van?

Having said that, maybe I should first check the connections under the mirror motor controls on the door card to make sure I haven't get water in there to affect the plug connections!

 

[Hettie's Crew]

@Hettie's Crew, please would you say how you got access to the area where the sensor is to replace it? Did you have to remove the mirror from the van?

Mine wasn’t in the mirror, it was on the chassis but it can’t be too difficult to take the mirror to bits for access to the sensor.
This video shows a strip of the mirror, not a sensor one but must be similar.

 

[dna]

Mine wasn’t in the mirror, it was on the chassis but it can’t be too difficult to take the mirror to bits for access to the sensor.
This video shows a strip of the mirror, not a sensor one but must be similar.

Thank you - another case of me using the wrong search terms so not finding the video!

Also apologies I forgot your earlier posts about having the A class van. I do try to find things for myself before asking for help

 

[dna]

Thank you - another case of me using the wrong search terms so not finding the video!

Also apologies I forgot your earlier posts about having the A class van. I do try to find things for myself before asking for help

i did a short trip in the van yesterday and the temperature readings were normal - did the sensor sense it's days were numbered and decided it better behave properly????

 

[Hettie's Crew]

i did a short trip in the van yesterday and the temperature readings were normal - did the sensor sense it's days were numbered and decided it better behave properly????

Mine used to occasionally do that but not quite normal, two to five degrees ish high. It was always high readings when it went wrong showing 40, 50+ degrees sometimes higher. In the end it just showed - - - and died.
It took me months to find mine on the chassis member, though the information was on here in an old post that I eventually found.

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[Richard n Ann]

I read somewhere years ago the sensors are 10k NTC so I made a note of it 99p on ebay:

NTC Thermistor Temperature Sensor 5%/1% MF52A 3950K 1K/5K/10K/50K/100K | eBay

MF52D 5K 10K 20K 50K 100K B: 3950 Accuracy 1% 50MM NTC Thermistor Negative Temperature sensor PVC lead.

www.ebay.co.uk

 

[kingspeed]

I’m no mechanic ….but a vehicle with a persistent fault and no outside temperature showing at the same time, is a massive clue.
If the owner has taken the time to fix the (relatively simple) outside temperature issue, he would have inadvertently fixed the dpf issue as well

Hindsight is a great teacher. Advanced information is the key. Every day is a school day.

 

[tonysuvla]

Dealers should have fault diagnosis trees for this. One of which would state that regen only happens with a temperature sensor reading in a suitable range.

If people think this is esoteric and modern cars are overcomplicated, what about the oddities of vacuum leaks, or the fun that could be had with carbs that would be fine until things got a bit warm in traffic.

We had a Hillman Minx with the fuel line routed over the engine block. Climb a hill, engine gets hot, fuel vapourises before getting to the carb and car stops!
Tried insulating the pipe (asbestos string!!!) but never really solved the problem.

 

[Andy_Elddis125]

My 2015 Peugeot Boxer was displaying the wrong temperature and I was able to put a new thermister in the wing mirror.
Lot cheaper than buying a new wing mirror.

 

[BikerGraham]

I had to replace mine last year (Peugeot boxer 2017) as it was showing 70 plus degC.

It was going in for a service anyway so got the garage to do it.
They replaced the sensor only.
But with the labour costs and cost of sensor, it was still pretty damn expensive to do. Think all in, it was around £250

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[L' Hobo]

I had to replace mine last year (Peugeot boxer 2017) as it was showing 70 plus degC.

It was going in for a service anyway so got the garage to do it.
They replaced the sensor only.
But with the labour costs and cost of sensor, it was still pretty damn expensive to do. Think all in, it was around £250

I'm happy I drive a 2007 Euro 4 Ducato and can buy a new cheap, complete mirror from Coastal, without temperature sensors.
It hasn't expensive DPF or CAT either, he says smugly.

Help the planet?
I'm allowing Mr Sunak & King Charles to fly, separately to Cop28 on the Tax money I paid in for 50+yrs!

 

[L' Hobo]

I was browsing YouTube last night & stumbled upon this post, who would have thought it.

Make of it what you will, but I'd never have thought of this solution.

In the January edition (now on sale) of the Car Mechanic magazine, there is a 4page article about DPF's.
Might be worth having a look?

 

[Lenny HB]

It hasn't expensive DPF or CAT either, he says smugly

2007 Euro 4 Ducato should have a CAT if it's the Multijet engine.

 

[Gerry77]

Not quite the same but the above comment of trial and change(?) reminds me of when I had a BMW 635i circa 1995 and it developed a fault, very rough running. As my other half was driving she was recovered to a Genuine BMW dealer who 4 days later said it was fixed. I went to collect it and it was still as rough as anything. The mechanic who handed over the keys was apologetic and said old cars like this they assume the owner can afford to get it sorted by merely changing parts, the bill was £182. I sent a letter to the garage complaining and copied it to BMW UK.
In the meantime I was recommended to try a 3rd string garage 20miles away. I pulled up outside the workshop and went in. Within 2 mins of discussing the problem he said what was wrong ! It was a pressure regulator relay on the fuel injection rail causing over fuelling. He showed me but he didnt have one so told me what to get and to fit myself. Did that and it ran as smooth as ever. Cost about £5.
BTW BMW instructed the dealership to give me a full refund too !

 

[L' Hobo]

2007 Euro 4 Ducato should have a CAT if it's the Multijet engine.

Not according to Fiat Professional garage.
The early X250's had neither and cannot fail on MOT (unless smoking ) as the law wasn't passed until November 2008
PS. It is the multijet engine.

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[Richard J]

And about time too! The old unreadable analogue dash speedometer is a disgrace. I wish there was a way to retrofit a digital dash.

I just got one of these; not a perfect solution but works well. Also easy change MPH - KPH