my bf said the codes its reading are o2 sensor, HTDo2 sensor, and the egr, what is the htdo2 sensor

Question

i dont know the actual codes but i do know it said something about o2 sensor, htdo2 sensor and the egr our car has not wanted to start for over a month and i have no christmas shopping done due to putting all money towards parts for this dang car and obviosly none of them are correct because its still not starting.

Answer 1

I would start by checking to see if the car has, intake leaks and fuel pressure and if its getting spark, its possible to have p0171 and P0174 which can be for intake leaks, low or no fuel pressure and or bad Air to fuel ratio sensor

it will be helpfull if you can post another question with the exact code.