OBDII System Description Notice

WARNING: This page does not describe the selected car, but rather 249 other vehicles, including the 2004 Saturn Vue, 2004 Saturn L300, 2004 Saturn Ion Red Line, 2004 Saturn Ion 3, and 2004 Saturn Ion 2. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: The OBDII symbol is used on the circuit diagrams in order to alert the technician that the circuit is essential for proper OBD II emission control circuit operation. Any circuit which fails and causes the malfunction indicator lamp (MIL) to turn ON, or causes emissions-related component damage, is identified as an OBD II circuit.