i got
0803 absolute pressure sensor
0302 egr system hi/low flow
0707 rear 02 sensor


could it be possible that 2 first codes are connected? should i change the absolute pressure sensor and this might resolve egr or absolute presure sensor has nothing to do with it and not bother to change it. can egr lead to long run problems if not fixed? or maybe egr is somehow connected with o2 sensor and by changing o2 possible to get rid of egr problem

 

you have a 96. chances are the small EGR pipe is clogged. and no they are not related. EGR isnt related to the 02 either. not directly anyhow.

 

Id start with the egr problem and then go to o2 sensor. The absolute pressure sensor does not come cheap. About 190 from dealership.