Cadillac Repair: 1997 cadillac sts, cadillac sts, climate control

Question
QUESTION: what is this code 4 a the 97 msm-b 2120 / mmm-b2148 / mmm-b 2150

ANSWER: The FIRST thing you want to do is CLEAR (erase) ALL these codes from the computers and see if they return as HISTORY or CURRENT codes.

To CLEAR the codes use the climate control panel IF you know how to PROPERLY clear these codes.

---------- FOLLOW-UP ----------

QUESTION:  I already cleared the codes and the ones that I asked you about are still there. I have a vibration in the front and I thought it might be the spindle.

Answer
There is no such code as a 4a.  MSM codes are a problem with your power seats and mmm is with the if memory serves without looking it up a fault with the seats also.

You will need simple electrical schematics, Test procedures and picture locations of the components within the system that is causing you problems of which can't be done on this website which only allows one picture. I do not have a website so you will have to e-mail: onlineautohelp@msn.com in order to obtain the information.