I just recently finished my turbo project on my 97 civic ex with an edelbrock turbo kit, garret t28, 5-7 psi, fmu tuning, but for some reason i have had the check engine light come on twice now and each time it has read code 13 BARO code or atmospheric pressure sensor. So after that i researched and didnt really get too much help, so i unplugged the battery and unplugged the map sensor then plugged everything back in and the light went off. But now its on again and its the same prob................anyone kno wat would cause this or wat the atmospheric pressure sensor does? thanks a lot

 

do you have check valves or missing link on the map sensor???

 

bump im not really sure what those are

 

your map sensor is reading boost you will always have that CEL unless you convert to obd1, or use a missing link

 

the honda ECU is not designed to see boost. When it does it thinks there is a major issue and sets the CEL.
you either need to block the boost from the map sensor using a missing link or a check valve with a custom mount.
Or convert to OBD1 with a Crome/Hondata/Uberdata setup that is setup to see boost and get rid of the FMU.