Question about 1997 Lexus ES 300

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How many O2 sensors on a 1997 Lexus ES 300?

I keep getting an error code PO141. I replace the Q2 sensor in the front of the engine. But I still keep getting that error code PO141. How many O2 sensors on a 1997 Lexus ES 300?

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Roberta Smith

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According to the manual i have... it has three.... one in the exhaust manifold.... and two in the exhaust pipe..... slightly vauge on the exact location of the last two sensors... but looks like it is after the catylitic converter.

Posted on Apr 15, 2009



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97 es300 has 3 O2 sensore. 2 in the engine compartment and 1 after the Cat.

Posted on Jun 06, 2009


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I have a 2000 lexus es 300 that has check engine light on and vsc light on

Check out this website Have your OBD code and what you did question.

Feb 01, 2013 | 2000 Lexus ES 300

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I have a 1997 lexus es300 check engine light came on code PO420 what could this been

Code P0420 indicates cat convertoer efficiency below threshold. Sorry, but this usually means the cat is shot. Probably will need pro diagnosis, and if cat is indeed bad, have them try to figure out what killed it. Can be anything from misfires, to coolant getting in the combustion chamber. Outside chance of o2 sensor problem, but this one usually requires the sensors to be working correctly to set. Due to the diagnostics neccessary, probably you will save money by having it looked after by an experienced independant, who's familiar with this model.

Nov 05, 2011 | 1997 Lexus ES 300

2 Answers

Code p0420 on 97 lexus es300

P0420 is catalyst below threshold. It is triggered via the rear o2 sensor (post cat), so you may want to check that sensor to make sure it's functioning properly.

Oct 01, 2010 | 1997 Lexus ES 300

1 Answer

My 96 Lexus ES 300 Check engine light keeps going on and off.

take it to autozone and have them hook up the code reader. your on board computer stores the codes and you will know what the problem has been. but i think it might be your O2 sensor. but you need to hook it up to the reader first

Mar 09, 2010 | 1996 Lexus ES 300

1 Answer

Hello I have a 97 Es300 and the check engine light has turned on. I have replaced my O2 sensor and the light has come on.

your es acually has 3 o2 sensors. one of the ones you didnt replace may be bad, but then again a lot of things can make the check engine lite come on. recheck the plug connection on the one you changed and make sure its plugged in all the way. if it is you should have the vehicle scanned to pinpoint your other problem.

Nov 01, 2009 | 1997 Lexus ES 300

2 Answers


Hello fellow Texan!

AutoZone should have gotten more than 1 code for this problem. The problem could be any number of things from knock sensor to O2 sensors. More information is needed.

Jan 24, 2009 | 1992 Lexus Es 300

1 Answer

Installing an o2 sensor

The O2 sensor goes in the exhaust pipe just below the exhaust manifold. That model may have an O2 sensor on each side of the engine, but they should be the only thing screwed into the exhaust pipe. And I would use TOYOTA brand parts or, if you have to replace it again,(and you probably would), you may have trouble getting it out.

Nov 22, 2008 | 1997 Lexus ES 300

2 Answers

2002 es 300 lexus

There is one before each catalytic converter (usually up right near the exhaust manifolds), and one after each cat (or if you have a Y-pipe exhaust that brings the two sides together to one pipe and one converter, then there's one after that single converter). Why do you want to change them? Have you gotten failure codes or are you having poor gas mileage? Or have they just been in there a long time? They're usually good for about 60k miles, although of course they can fail early. Usually the symptoms are poor fuel economy, running rich (seen by black smoke out the tailpipes and some rough idling, as well as blackened spark plugs), or fault codes dealing with system-lean or system-rich descriptions. Those symptoms are indicative of bad primary O2 sensors (the ones closest to the engine). If your secondary sensor(s) are failing (the post-cat sensor or sensors) you'll trip a check-engine light warning you of poor catalytic converter efficiency.

Sep 28, 2008 | 2002 Lexus ES 300

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