: New to Forum - great Resource - some error codes.

12-02-12, 11:42 AM
Im new to the forum and just wanted to say that this is a great resource. Hopefully I wont have to access it too much, however, in the cases where I do I am appreciative that the forum is here.

Own a CTS 2004 3.6 Ltr. its been a great car, bought it used, put 98k on it in the last few years with little maintenance. Had the coolant issue for the tranny, a couple of rear axles go, some small starting issues. seems that a few items are wearing out. changed brakes of course and oil religously with Mobil 1.

not the best at typing, but what the heck. live in Northern ontario, looking to find out what the P1825 and 1826 codes really indicate. I think its a temperature sensor, not sure.

any help is greatly appreciated.


12-02-12, 11:44 AM

You can find all your code definitions here. http://myweb.accessus.net/~090/dtcobd2.html

12-02-12, 01:10 PM
Transmission Internal Mode Switch (IMS) problems. On the valve body. Operated by the gear stick shift cable and quadrant on top of the transmission.

12-02-12, 09:57 PM
Welcome to the forum. Lots of great info and people in here. Enjoy your stay!!!