October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

DTC Descriptors

WARNING: This page is about a different car, the 2005 Saturn Ion Red Line, 2005 Saturn Ion 3, 2005 Saturn Ion 2, and 2005 Saturn Ion 1. However, it is still accessible from the selected car via links, so may be relevant.

This diagnostic procedure supports the following DTCs:

U2103 Fewer Controllers On Bus Than Programmed
U2104 Controller Area Network (CAN) Bus Reset Counter Overrun