I experienced the same with the same.
At first it was only P0130 been thrown up more frequently and frequently.
Later on followed by P1131 causing going into limp mode.
Apart from the limp mode caused there was no noticable difference in driving, except maybe for fuel consumption that had never been anything to write home about.
What I did to resolve:
- take the (only one you have on this car) lambda sonde out. A 22mm spanner fits just in between, but a special socket for Lambda sondes would be nicer to work with, plus you will be able torque it afterwards.
- by means of a toothbrush I firstly gently cleaned out the small bores. A remarkable amount of black dry powder (soot) fell out.
- secondly I used an air gun (be careful what you breathe!)
- finally I used some EGR cleaner to clean the surroundings and thread.
- used MES to clear the faults and performed Lambda procedure in the ECU (as if a new one was fitted).
I got rid of both failure codes instantly.
What has been surprising even more, is the truly giant improvement in fuel consumption afterwards. I went from 43.5 MPG @100km/h on the cruise to a 49.5
(I must admit however, I also poored a can of fuel injector cleaner a couple of hundred kilometres prior to cleaning the sensor. Forte Diesel Injector cleaner on half a tank BP Ultimate which I always run).
Seemingly the Lambda sensor has quite some influence (mine is still standard 170hp btw, EGR on and DPF untouched. The DPF core looked quite clean from above btw. Used a vacuumcleaner while cleaning out the thread of the Lambda socket. See pictures).
But..... about another 8k KM further P01030 came back. Still, nothing noticable on the behavior of the engine. Fine injection correction values, fuel consumption same level of improvement, nor increase of regenerations).
So, I cleaned it a second time. This time also sprayed inside the sonde some cleaning agent. Again it did the trick for some 2k KM now.
I don't think the fault code is result of another cause actually, the engine is running too good for that, perhaps the service interval of these sensors aren't that long as BOSCH is claiming. However, for the price of it you better try cleaning first. Once the fault code comes back a third time, I will consider replacement.
It would be nice if somebody could clarify a bit on Lambda values that should be considered as normal and alarming. Ours concerns a LSU 4.9 model.
Hope this will set you off at least, good luck!