Hey,

I was driving around and my CEL came on. Did the home test w/ a paperclip and got the DTC Code 03. From jdmfan.com:

03 Manifold Absolute Pressure sensor Open or short in MAP sensor circuit, defective MAP sesnor

So what now? I have a 98 EX with the 92-95 GReddy kit on there. Haven't touched the boost setting at all. Any ideas on what I have to do? Thanks!

 

how much boost?
are you using the blue box?

 

Stock boost (5.5 psi)

Blue Box - Yes

 

Blue box doesn't work all the time for some reason. Disconnect battery and then reconnect to reset ecu and be on your way. I have never had good luck with the Missing Link check valve, but they have worked well for others. Try that if you may.