i know code 13 is baro sensor, but i have one o2 sensor in the exhaust manifold and the other after the cat under the car. the muffler shop that made my downpipe said i might get a cel since the temperature may drop too much between the two sensors since they are usually mounted one just before cat and one just after. i can always move the primary to the end of the downpipe (i have another o2 bung for wideband), but when i was n/a and moved o2 from just after head on precat style car and got dc header and separate cat under the car the car bucked badly at cold start having o2 that far away from exhaust ports. it was ok once car warmed up or after one good pull.

i reset and will see what happens. car seemed to run fine with it and everything i have read seems to say the same.

btw setup is:
safc
dsm 450 and resistor box
tdo4L from '02 wrx

 

I don't think the problem is that they are too far away from each other...it might be that your primary 02 sensor isn't warming up correctly. Later model 02 sensors with heater's operate from 600-1200*F , and the point of the heater was to get to those temperatures. The heat helps with ionization.

If it takes warming up, or a good run to get your car running properly, i think the o2 might be a little too far to warm up quickly.

 

so wtf does that have to do with the barometric pressure sensor?