Why does my cat monitor keep starting over?
Why does my cat monitor keep starting over? That could cause this symptom. The ECM would randomly keep starting over with the monitors. And maybe the cat monitor is just the one that takes the longest to complete. A bad/loose fuse to the ECM, bad battery connections, battery on the fritz that drops out on bumps, etc. Is the cat monitor not ready but no? To summarize: 2 months of mixed street/freeway driving and execution of the specified drive pattern, all other monitors set, but not the cat monitor, and no trouble codes current or pending. Ideas, please? SteveC76 July...