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There is no maintenance interval since these are not routinely changed. if you have a bad one or one that's become lazy (slow switching) or very high miles or mil on with code you might change them. If you have a bad one upstream, you should do both, since other is usually right behind it. These are more important to the actual running of the engine since injector timing is based on what they read. The downstream or one behind the convertor I wouldn't worry about too much unless you actually get a code for it-all it does it monitor catylist (convertor function) Convertors never wear out-if your engine is running right. People only replace convertors if they get "killed" by a poorly running engine-raw fuel superheats the catylist and they fry. Important note-upstream and downstream sensors ARE different, although both upstreams will probably be the same part no. Buy the right one and the job is easier with the special O2 socket.
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How do you tell if an oxygen sensor is upstream or downstream on a '96 Geo metro I just have one.?
The closer to th engine is upstream and the farther is downstream Before the cat upstream After the cat downstream.
Is the upstream oxygen sensor the same as the downstream oxygen sensor?
no. the upstream sensor is the one before the catalytic converter and the downstream is the one after
What does upstream and downstream mean in business?
Upstream and downstream refers to the supply chain of an industry. For example, if you're looking at a distribution plant then the manufacture would be downstream and the retailer would be upstream. Events or processes that happen before whatever is being looked at is downstream and whatever happens after is upstream.
How do you tell if an oxygen sensor is upstream or downstream on a 2002 Chevy silverado 1500?
Upstream would be before the catalytic converter. Downstream would be after the catalytic converter.
Is upstream before the catalytic converter and downstream after the catalytic converter?
Yes
Where is the oxygen sensor located on Plymouths?
There is an upstream and downstream o2 sensor. The upstream is loctaed in the exhaust manifold before the catalytic converter. The downstream is located behind the catlytic converter.
Do you need upstream or downstream oxygen sensor?
Depends on what the problem is or what code was set.
Where is the upstream and downstream oxygen sensors located on a 99 dodge stratus?
before and after catalytic converter.
Is the bank 2 sensor 1 on an 2000 Infiniti I30 upstream or downstream?
Sensor 1 would be UPSTREAM before the exhaust enters the catalytic converter
How many o2 sensors on your 04 Liberty?
4, 2 upstream (before the Cat) 2 downstream
How many oxygen senors does a 2011 camaro have?
2 upstream (before the cat) and 2 downstream (after the cat).
How many 02 sensors on a 2002 Lincoln Continental?
Four, two before the cats (upstream) and two after the cats (downstream).
