Question about 2004 Chevrolet Silverado 1500 Crew Cab
This code sets when the indicated o2 sensor rich / lean transitions are less than the specified amount that the pcm wants to see. You need to determine if these sensors are staying lean, (possible vacuum leak,weak fuel pump for example) or rich(faulty map or mass airflow signal, or leaky injector for example) Either code can be a faulty sensor also,but there are many other things to consider before throwing parts at it. Your first challenge , is using the data stream to see what the sensors are telling you, and then to determine what is causing this. This is what drives real mechanics up the wall, people go to the auto parts store, get codes read for free, replace o2 sensors,and it turns out to be a vacuum leak. Believe me, if there was a machine that just told you what's wrong, we would all have one! Let me know if I can help furthur, glad to do it!Good luck!
Posted on Feb 11, 2012
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Posted on Jan 02, 2017
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