Question about 2002 Toyota Camry
I can find 3 of the 4 O2 or (A/F)(O2)sensors. Standing in front of car, I see the 1st one coming out of manifold in the 1st cat.on the right side of engine. Under the car > still towards the front of the engine I see 2 more O2 sensors. Where is The 4th one?
HO2S( heated sensor) are before the cat convertor either in the manifold or exhaust pipe to the cat converter
O2 sensors are in the exhaust after the cat converter/s
I am drawing the difference because they are not all O2 sensors as each has a different operation for the position in the exhaust
the missing one will be in the exhaust manifold or pipe at a convenient position for servicing before the cat converter
Posted on Jan 09, 2016
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Posted on Jan 02, 2017
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