I'm trying to log my afr threw my egr and i cannot figure out the afr error, it go's to unsupported parameters, when i connect to vechicle, It is a 03 silverado ss, My egr volt's work and in the histogram it logs afr but all zero's. I attach a screen shot of the function string, Is this the prolbem, I follewed the write up in the I/O section, please can some help out, I cannot upload the file it is to big, the function string i used is 100*[user 9005]-[sens.121/[sens.121]