Question about Kia Sedona
Where is the upstream 02 sensor bank 1 and how do you change it?
Ok, up stream means close to the engine, down stream would be close to the catalytic converter. Bank one is with no 1 cylinder bank 2 is opposite side of engine. If you stand directly to the side of the engine and look across you will see that one of your cylinder heads protrudes more than the other, this will be bank one and the one staggered back is bank two.
Posted on Apr 28, 2013
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Posted on Jan 02, 2017
Up stream O2 sensors are always before the convertor. Check the exhaust manifold, if you have a V6 you may have two, make sure you know which one is bad.
Posted on Jan 25, 2009
SOURCE: oxygen sensor confusion
1/1 is upstream sensor on the number 1 cylinder side, 1/2 is the downstream of the number 1 cylinder side, 2/1 is the upstream of the number 2 cylinder side, 2/2 is the downstream of the number 2 cylinder side. Hope this helps.
Posted on Aug 10, 2009
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You could have an enefficient converter. Question is what caused it to go bad? I have attended seminars on code 420, Possible causes are lack of spark or clogged fuel injectors. there have been times where the spark plug wire lays on the engine and over time it wears a weak spot in the side of the wire, its not enough to throw a miss fire code but it keeps the full amount of spark from getting to the plug and not burning the all the fuel in the cyl. A leaky injector would also cause to much fuel to be deliverd into the cyl and not get burned.
Hope this helps.
Posted on Jan 20, 2010
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