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2007 OBD System Overview for Gas Engines by Hector Garcia is a document available to read on EtoBox.

What is 2007 OBD System Overview for Gas Engines about?

The document summarizes the catalyst efficiency monitor used in OBD systems. It uses oxygen sensors before and after the catalyst to infer efficiency based on oxygen storage capacity. A high efficiency catalyst stores significant oxygen, slowing the rear oxygen sensor switching frequency and reducing amplitude compared to the front sensor. As efficiency declines from deterioration, the rear sensor begins switching more rapidly with increasing amplitude, similar to the front sensor. The main failure mode for

Author

Hector Garcia

Language

EN