22 Hynudai Tucson - diesel particulate filter warning

yellow hen

We just bought a 2022 Hyundai Tucson from a large dealership on Friday. Drove 15mins on a motorway afterwards. On the Sat afternoon, I got in and the diesel particulate filter warning light was on. After 20mins of hard driving it went off. I haven't yet rang the dealership as I wanted to check if:

a. this light is a 'reminder' type warning that the car needs to have it's legs stretched to clear it OR

b. it is a more significant warning of imminent problems with the filter?

Would appreciate advise from anyone who might know. thanks.

Kimbot

Generally its because the car probably done short trips and didnt get up to temp to do a regen.

yellow hen

https://www.boards.ie/discussion/comment/123697978#Comment_123697978

So a reminder to do a regen only? Not something that needs to be flagged with the garage?

GPoint

They put owner manual books into the glove box , usually. Search for DPF in it and you should get an answer.

magicbastarder

i'd flag it with the dealer now anyway; just means that if something happens with the DPF in six months, say, you can then state that the DPF was showing warnings from the moment you bought it.

Cordell

Even if it was previously driven mostly on short trips, newer diesels should be a lot more tolerant with this, so I would go back to the dealer, especially as it should still be within the 5 years warranty.

User1998

https://www.boards.ie/discussion/comment/123698405#Comment_123698405

Can’t see how a DPF would be covered under a 5 year warranty. It wouldn’t even be covered under most used car warranties, but since it’s happened so soon I would send it to the dealer

Cordell

https://www.boards.ie/discussion/comment/123698465#Comment_123698465

It's the Hyundai's 5 years warranty which should cover the DPF.

User1998

https://www.boards.ie/discussion/comment/123698490#Comment_123698490

A blocked DPF generally wouldn’t be covered tho, unless there was a manufacturer defect such as a cracked DPF etc.

You can’t just drive around town for 5 years and expect your DPF to be replaced FOC when it eventually blocks

Cordell

Actually after dropping 40k on a new car I totally would be expecting everything to be covered including the DPF. If the car is not suitable to town driving it should not be sold in countries that have towns :)

Hyundai's warranty comes with free yearly health checks which should flag any issue before it becomes a problem e.g. no regens, or failed or interrupted regens.

bazz26

https://www.boards.ie/discussion/comment/123698623#Comment_123698623

No warranty covers every single thing on a car irrespective of how much you paid for it. I'd also be surprised if these health checks includes checking the condition of the DPF system assuming the previous owner actually had the health check done every year.

And if the car is not suitable for the buyer's driving then the buyer should also educate themselves on what type of car suits their usage and driving style best rather than just walking into a showroom and saying take my money to a sales person. Buyer has to take some responsibility too.

Back to the OP. A DPF light coming on wouldn't be necessarily as a result of one 15 min trip on a motorway. It's very possible that the previous owner did do lots of short trips to cause that. While a blocked DPF may not be covered under the original warranty if the car was driving incorrectly, it was only bought last week so the OP has a reasonable right to go back to the selling dealer and have them diagnose the issue. It's very possible that they will need to force a DPF regeneration to clear the soot out or it could also be a faulty sensor.

9935452

https://www.boards.ie/discussion/comment/123698623#Comment_123698623

Would you expect wearing items such as break pads,tyres and clutch to be covered under warranty?

I know an auld lad at home who burnt the clutch out on 2 cars' one at 3000 miles and the other at 800 miles from new. Wasn't covered under warranty wear and tear due to his driving style

Dpfs normally get blocked from constant short trips where it doesn't get up to temperature or get a chance to complete a regen.. car usage causes it. The first owner might get away with it for a few years.

All the dealer will do is tell you to take tge car on a long trip on the motorway once every few weeks to clean it out or force a regen

Cordell

https://www.boards.ie/discussion/comment/123699415#Comment_123699415

Would you expect wearing items such as break pads,tyres and clutch to be covered under warranty?

Those are consumables, they are designed to wear out, their linings are designed as sacrificial sections that shed a bit of material with every use. The DPF (and catalytic converter as a single unit) is not a consumable, it is supposed to last for the full lifetime of the car.

So yes I fully expect the DPF to be covered in year 3 with their 5 years unlimited mileage warranty. If the DPF got blocked so early it was either bad from the start or, much more likely, there is something else wrong with the engine.

User1998

https://www.boards.ie/discussion/comment/123700287#Comment_123700287

Or, the previous owner failed to regenerate the DPF. I have bought cars that had DPF errors appear within 100km, and they never reappeared again after the long drive home.

CiboC

https://www.boards.ie/discussion/comment/123700287#Comment_123700287

The DPF is considered a consumable, albeit one with a long life - I had a Citroen C4 and the dealer gave me a warning that the DPF was coming to the 'end of life' mileage and Citroen considered it a consumable to be replaced at 200k km.

Cordell

If you put it this way everything is consumable, e.g. piston rings and bearings and other components are not expected to last forever, but they aren't frequently replaced like brake pads either.

GPoint

DPF should be covered .

Ford definitely covers it for whatever warranty term they have, even with extended warranty they used to have which was 7 years.

Speaking of Ford, the car would start displaying warnings asking to drive the car to regen and send same errors to the app on the phone. This would be after just a week of short trips.

They took very conservative approach I guess to safeguard it from failures. Once driven for just 15 mins it get cleaned and errors go away.

BMW just runs a regen when stationary after you stopped the car and does not care if you driving or not.

Expect Hyundai to be same with how they manage DPF

9935452

https://www.boards.ie/discussion/comment/123700511#Comment_123700511

I think wear and tear item is how they describe them.

Funnily enough when you mention bearings' wheel bearings are considered wear and tear items too.