You have 4 codes...12,32,42, and 55.
Code 12 - is battery has been disconnected within the last 50 key-on cycles (nothing to worry about)
Code 32 - is a no-working EGR valve or bad transducer. (Need to be replaced together.)
Code 42- Fuel pump relay control ckt, Auto shutdown relay control ckt, No ASD relay output voltage at PCM, Fuel level sending unit volts out of range, Fuel level unit No change over miles. (Relays may need to be replaced)
Code 55 - end of codes