Question about GMC Sierra 1500
This really sounds like the oxygen sensor. It's job is to determine, in real time, if the air fuel ratio of a combustion engine is rich or lean. Since oxygen sensors are located in the exhaust stream, when information from oxygen sensors is coupled with information from other sources, it can be used to indirectly determine the air-to-fuel ratio.
Posted on Jul 28, 2009
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Posted on Jan 02, 2017
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