Continuing DPF problems

[trossachs]

Hi all, looking for some advice. I have now been having problems with my dpf for a while. I have a 2007 2.0 dci done 120k miles and 80% of mileage is done on motorway

July 2017 dpf light comes on a couple of times but clears on the motorway

August 2017 light wont clear, end up taking to garage who do a forced regen and cant get it cleared. When I took it home I found fault code P2453 so changed the dpf pressure sensor. This cleared codes and MIL went out and all seemed fine.

March 2018 dpf back on and ended up in limp mode. Ended up biting the bullet and changing dpf for new. Took to garage to reset the dpf data.

This week its back on, code P1436, blasted on motorway on way to work light went out. However checking codes after I now have
P1436, P2452, P242f . after 2 trips MIL on (no dpf light) and in limp mode. Aaaagggghhh.

I am going to look at the dpf pressure sensor again, but anyone got any advice as at my wits end with this.

[Gel]

Google "Terraclean".

[Deleted User 3871]

Gel, he's only just replaced the DPF this year. Chances are it does not need cleaning, but not impossible.

P1436 - A/C Evaporator Air Temperature Circuit Low - Nothing to do with DPF

https://www.autocodes.com/p1436.html

P2452 - Diesel Particulate Filter Pressure Sensor 'A' Circuit - Worth replacing the sensor. Make sure the sensor tube is clear.
P242F - Diesel Particulate Filter Restriction Ash Accumulation - This is similar to P2452 and could be the same thing.

Google "Terraclean".

[Amonem]

I have qashqai 1.6 DCI 2014 J11. A couple of days ago noticed lack of power at 2000 rev when ascending our hill. Now there is error code on reader, stop start failure showing on display with both yellow and red engine warning lights on. Reading the code it says that DPF needs regenerating but understand J11 should do this no matter how long you drive. I have done a 50 miles run with high rev 3000 without any luck. Tried reseting the error code without any success.

I have read this may be caused by EGR valves or rear oxygen sensor.

Any help appreciated.

[calnorth]

This kind of thing may have an electrical/electronic source. And a relationship to temperature in use (heat)

Did anybody test sensor(s) signal lines for reliability/stability when engine hot?