I bought a 05 Silverado 6.0 and check engine light comes on and my coded reader keeps saying malfunction oxygen sensor bank 1 sensor 1.. bank 1 sensor 2.. bank 2 sensor 1.. bank 2 sensor 1 and bank 2 sensor 2 basically all of them and have sounds like a spark knock only when accelerate faster not so much under normal driving gassing very slow.has 184000 miles tried premium octane gas seemed worse and got a knock sensor code twice leaning toward replacing knock sensors and harness and doing the silicone recommendation does this sound like replacing the sensors and harness sound correct also looks like the guy cleaned the engine because it looks like new .just wanted to make sure I am doing the right thing before I take the intake off ..I know engines pretty good and wanted to make sure this is what to be doing first ..thanks in advance ..

 

if you have all 4 o2 sensor codes and knock sensor codes I'm going to assume the engine isn't running right, if you have "spark knock" you have other issues that need addressed before throwing sensors on it.

 

if you can hear a knocking, i'm betting that is what the knock sensors are picking up. its quite possible the knock sensors are working properly.

post the codes.


read through the knock sensor diagnostic. the dtc may not be from a fault in the sensor or circuit but an actual knock in the
engine.

the knock sound, deep heavy sound at crankshaft speed or is it a ticking noise at camshaft speed. I have seen a few bad camshaft and lifters on the 6 liters.

 

the engine dont run bad at all and its not loud noise almost like a ticking but not the exhaust ticking most have.. also could my O2 sensors being bad causing the timing to act up..

 

The engine has no internal sounds at all it actually runs real good and the sound isnt there on normal driving I have rebuilt many engines and this is no way anything major it just has a almost a ticking sound not from exhaust either ..I will add the codes in my next reply thanks any other Idea that would trigger all O2 sensers ..I had a knock senser code come up twice but o2 alot ..

 

this are the codes I hope this helps something ...PO.0332 Knock sensor circuit low input bank 2....PO 060 bank 2 sensor 2 heater resistance ...PO 054 bank 1 sensor 2 heater resistance...PO 053 bank 1 sensor 1 heater resistance....can someone lead me in the right direction plz ..

 

any fuel trim readings? has the exhaust or transmission been removed for any reason?

 

not sure the what the diag is for that code without service info; i'd check the 02 sensor heater fuses as its easy to do.

 

OK I will try that today tx

 

Want to help others with this issue I replaced my knock sensors like advised both front/rear and harness with silicon water dam and green teal intake gaskets also cleaned throttle body and that was really dirty also replaced bank 2 sensor 1 that I tested with multi meter had a bad heating element and problems all went away so thanks for the help for this issue and know bad knock sensors and O2 sensors can cause many other problems see first post..thanks to all that helped me I really appreciate taking time to help me .