1.6 dci 130 exhaust temperature error P0544 and P0545

Hello all,
I have an issue with my Megane 4 1.6dci 96kw. On Friday during highway driving the "Check injection" message poped up and after couple of seconds it disappeared like nothing happened. I noticed it because it turned off the cruise control, but once it disappeared everything was like usual. Then it repeated several times. Engine restart did not helped. Today after 80km of driving it reoccured. I checked it via Car scanner and screenshot is attached. Errors P0544 and P0545. Do you know where exactly is the Exhaust Gas Temperature sensor is it easily accessible? Before going to dealership I want to check connectors and wires if there is no cuts etc.
And second thing, is it safe to drive it with this error? What is affected by the failure, DPF regen? Is it good idea to force DPF regen via Car Scanner app?

For me it's quite unfortunate, because we are going to Italy next weekend (I'm from Czech rep)...

Thanks for your advices,

Ondřej

Hi Georg,

Thanks for the reply. How can I check it's EGR? I have the OBDII diagnosis and according to it EGR runs well.

The issue occurs after at least an hour of driving, no matter engine revs.