code 41 and a code 54 on 1994 GMC Sonoma

I have replaced the crank sensor in hopes that's what this was but it didn't solve anything the engine runs smooth but is gutless i cant get it above thirty and its drinking a lot of gas and the cat converter glows red after running for awhile it idles smooth just hesitant when climbing rpms what should i replace next with these two codes showing?

by in Harrison, TN on April 17, 2013
0 answers