MIL codes?

My 1997 Dodge 2500 Diesel 5.9L (CA emissions) has a check engine light on.

I get from the decode 12 and 32.

My Haynes manual doesn't have 12 in it. Does anyone know where I can get a full list of the codes?

Thanks,
Ken

http://www.allpar.com/fix/80s-codes.html
Excellent. Thank you.