Fault Code

I pulled the codes after fixing my A/C and changing out the air box with a aftermarket cone filter. I get Code 12. The Haynes manual doesn't have a code 12. Does anyone know what this is?

I pulled the codes after fixing my A/C and changing out the air box with a aftermarket cone filter. I get Code 12. The Haynes manual doesn't have a code 12. Does anyone know what this is?

When you pull the codes you will get a code 12 at start & a code 55 at end of codes. 12 battery disconnected within the last 50 starts, really says computer is working. 55 is the end of codes Dale :banghead: :grinno:

Thanks Bro.