NO4 gas temp sensor - part number

Hi all,

I was wondering if anyone could help, I have 2008 Audi A4 2.0 143, tdi avant, I had a DPF removed last year, but have just got an engine check light and a flashing glow plug light,

Took the car into a local garage and the run some diagnostics, but could not fix the problem because of the remap and DPF removal.

They gave me a diagnostics write up but to be honest I don't understand it, but in the summary they mentioned NO4 gas temp sensor.

The fault come up as, 4912 (P246E00) exhaust gas temperature sensor circuit bank 1 sensor 4 static

And

5258 (P246E00) exhaust gas temperature sensor circuit bank 1 sensor 4 static

Any help would be much appreciated

Yes as far as I'm aware it was.