Question about 2003 Chevrolet Silverado 2500HD
O2 sensor circuit. No activity detected. Bank 2 sensor 2. Take it back to the garage. They did something wrong.
Posted on Oct 17, 2013
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Posted on Jan 02, 2017
you should have three oxygen sensors on your car, one for each bank of three cylinders; should be towards the Y pipe on each exhaust manifold. Additionally you should have one on the exhaust pipe before the cadilitic converter.
Posted on Nov 20, 2008
These trucks have a drive by wire system,we seen a` lot with a broken ground wire on the rear of the drverside cyl head,this is hard to see just feel and give the wire a tug .If the wire is loose or broken the reduced engine power light will come on.
Posted on Feb 15, 2009
Depending on the engine it will have between 4 and 2.
If you had a straight 4 or 6 engine then there would be only 2, one on the exhaust manifold or exhaust pipe and then one just after the catalytic converter.
If you have a "V" engine (V8, V6) then you have an oxygen sensor on each exhaust manifold and will have a catalytic converter for each bank of the V. There will also be an oxygen sensor downstream of each converter as well. In this case there would be 4 oxygen sensors.
Posted on Oct 05, 2009
sounds like you know what you are doing, sometimes the codes have to be removed after repair, i'm not sure whether or not your vehicle requires this. If it is just a light bothering you try and clear the code and see if it comes back. Some Advance Auto or O'reilly has a tool to do this free of charge
Posted on Oct 13, 2009
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