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2000 Toyota Corolla Oxygen Sensors located.?

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Old 20 Jul 2010, 02:52 am   #1 (permalink)
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Default 2000 Toyota Corolla Oxygen Sensors located.?
Shop Replaced the Catalytic Converter and all of exhuast system. Check Check engine came back on. Shop said Oxygen Sensors should be tested. Isn't there a Oxygen Sensors on exhuast systemthat should of been taken care of.
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Old 20 Jul 2010, 02:55 am   #2 (permalink)
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typical locations:















if u have 1- exhaust manifold















2- manifold and before catalytic converter. the O2 sensors need to be cleaned probably.















check on www.autopartswarehouse.com to see how many u have.
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Old 20 Jul 2010, 02:57 am   #3 (permalink)
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Say what now? The shop replaced the cat without testing the rear oxygen sensor...EPIC FAIL!































There should be 2 o2 sensors on a corolla. The front one is crucial to determining the a/f ratio in the car...the rear one only tells the ecm/pcm that the catalytic converter is working. Meaning...if the rear code is triggering (p0420 in most obd2 cars) then it's faulty...and the mechanics doing this work are completely incompetent.
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