[Vacious]

Thanks... definitely worth a go!
Though I have another interesting lead - My Exhaust gas temperatures seems very strange - When the car is off, it always reads 104c, and generally stays around the 200c mark while driving which seems a bit low I think!?

Curious if this 104c when engine off is a common quirk, or a strong indication that my sensor is off.  Do these numbers seem unusual based on what you've seen from your car? (image attached)

[I30 GD]

Thanks... definitely worth a go!
Though I have another interesting lead - My Exhaust gas temperatures seems very strange - When the car is off, it always reads 104c, and generally stays around the 200c mark while driving which seems a bit low I think!?

Curious if this 104c when engine off is a common quirk, or a strong indication that my sensor is off.  Do these numbers seem unusual based on what you've seen from your car? (image attached)

Just checked mine, stone cold engine, engine off is 108 degrees, it will go up depending on speed and revs between 108 degrees and 300 degrees maybe a little more, I would say yours is normal, it will go up to high 500s to low 600s when regeneration takes place.

[Vacious]

Thanks! This is a relief...I read that removing these is very challenging at best.

I'm going to have a go at replacing the pressure sensor and see how things go from there.

[Vacious]

I replaced the pressure sensor - This certainly improved the readings :

Engine off went from 04hpa to 0hpa
Idle went from 28hpa to between 0hpa and 15hpa depending on whether measured before or after a regen.

However, this has unfortunately made zero difference to my regen intervals after about 700miles of driving.  The distance between Regen completions is still consistently between 110km-140km.

I was expecting some improvement after seeing the much improved pressure readings, I'm wondering if there's a way to register the new sensor in the ECU without going to a Kia dealer, as it appears like the ECU is not adapting to the new sensor.

I'll remove the dpf for a thorough clean in a month or so if things don't improve (seems unlikely that they will). 

[I30 GD]

I replaced the pressure sensor - This certainly improved the readings :

Engine off went from 04hpa to 0hpa
Idle went from 28hpa to between 0hpa and 15hpa depending on whether measured before or after a regen.

However, this has unfortunately made zero difference to my regen intervals after about 700miles of driving.  The distance between Regen completions is still consistently between 110km-140km.

I was expecting some improvement after seeing the much improved pressure readings, I'm wondering if there's a way to register the new sensor in the ECU without going to a Kia dealer, as it appears like the ECU is not adapting to the new sensor.

I'll remove the dpf for a thorough clean in a month or so if things don't improve (seems unlikely that they will).

Difficult one, the sensor seems to be fixed now, it will take a while for the engine to calibrate the sensor unless you can code it in.
I would try a battery disconnect first and do another tank of fuel, if that doesn't work maybe try an on car clean with a cleaning foam injected into the upstream pipe on the pressure sensor, I did this but not sure if it helped, as I said before, I also cleaned the intake, egr and throttle body at the same time so not sure what helped.








free image upload

[Mndgs]

I replaced two MAF sensors, because of the P0101 error chasing easy solution. Then with OBD scanner I saw that EGR doesn't work. So I had to get my hands dirty and clean EGR because it was stuck. Error disappeared. Later I had to clean DPF since it was regenerating every 30 km. Since cleaning it I had one regeneration after 200km and another after 700km. I will now post voltmeter readings  of DPF Differential Sensor of clean dpf (I have i20 RCDi 1.4 66kw):

Idle 1.02-1.04 V
2000rpm 1.04 V
2500rpm 1.08 V
4gear 60km/h 1.05-1.07 V
5gear 85-95 km/h 1.07-1.08 V
6gear 100km/h 1.08-1.09 V
6gear 120km/h 1.18-1.19 V
4750rpm 2gear 1.48-1.52 V

Before cleaning when DPF was full of ash:
At idle voltmeter showed 1.08 - 1.1 V
At 4750rpm around  2.5 V
4gear 60km/h around 1.25 V
6gear 100km/h around 1.35 V


You can convert to preferred units using this table:

DPS-2 hosted at ImgBB — ImgBB

When it is cold outside like now ( around zero degrees ) readings are lower. At idle voltmeter can show 0.85 V.

[I30 GD]

Further on from this, my Lucas sensor initially performed OK, regenerating at around 200-250 miles, then I checked it recently and it's dropped to 80 miles or so.
I purchased a genuine sensor from Partsouq.com, £72 delivered, came in 5 days from Dubai to UK, very impressive.
Fitted it and it was regenerating every 10 miles so not very happy, did a battery reset and got a 156 mile regen, currently halfway through the next one and it's looking a lot lower mileage but I think the sensor is still calibrating itself as I remember the Lucas one taking a couple tanks of fuel to correct itself.
Still got no error codes and live data on the various other sensors, egr, exhaust temp etc appear to be in range and no air leaks that I can see.
The saga continues............

[I30 GD]

Well, it's come to this......

[Foler79]

Well, it's come to this......

Good evening. What finally happened, did you remove the dpf for cleaning? Did the problem get fixed?

[I30 GD]

Well, it's come to this......

Good evening. What finally happened, did you remove the dpf for cleaning? Did the problem get fixed?

Removed the dpf for cleaning, got everything reset and it's still the same, not sure what to do now, I've been working on it for months and not getting anywhere.

[I30 GD]

Finally, it's fixed, I'll never buy a diesel car again, I could have saved so much money buying a petrol car, preferably not a Hyundai, I didn't get a VW because of spares costs, little did I know.

[Greyhound]

Finally, it's fixed,

What ended up fixing it. Can you elaborate?

Diesels with DPF's seem to be not suitable for regular short journeys. But I see some Petrol cars (inc Kia Sportage and Hyundai Tuscon) with GPF's are now being reported with similar issues. I had GPF lamp lit on my Petrol i30 PD on one occasion, but was able to clear it after a Motorway run.

Regarding VW. I know a few people with VW's over time and they have not all been happy bunnies. Skoda seem to be better from the "VW" stable.

[Foler79]

Finally, it's fixed, I'll never buy a diesel car again, I could have saved so much money buying a petrol car, preferably not a Hyundai, I didn't get a VW because of spares costs, little did I know.

What exactly did you do and pay for the repair?