Will a bad altenator throw any Codes

[dzl_x_4x4]

I am having issues with the charging system on the X. Tested Altenator and Batteries all tested good, Clean and installed everything, but after a few days the battery light is coming on again. Was wondering if there are any codes for electrical charging system.

Thanks!

 

[JLDickmon]

Probably find GEM codes and maybe a "low voltage" code in the PCM and/or ABS modules...

how is the belt?
clean?

DO THIS WITH THE ENGINE OFF!
does the tensioner move when you grab the belt & pull?
does it snap back?
DO THIS WITH THE ENGINE OFF!

 

[dzl_x_4x4]

I will check the belt tonight and look for some codes. The belt looked good and didn't have any oil or anything on it when I pulled the altenator. The Tensioner had pretty good tension when I removed the belt also. But I am ready to try anything at this point!

Thanks

Brett