Question about 2000 Lexus RX 300

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I have a 1999 Lexus ES 300 and just found out from stevenson lexus in Frederick that I need a new catalytic converter due to a code PO420 coming up on their computer. They quoted me $1160.00...do you know if a Toyota Dealer could do this work for less and still have it be the same quality? I'm new in Colorado and this car is my baby. Can you give me any suggestions? I don't want a knock-off part for my car. Thanks! dkk

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  • Lexus Master
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I would buy the factory part and have a local mom and pop shop replace it. its not rocket science to replace a converter. i would even have someone else troubleshoot the code they read to see if that is in fact the root cause of the code.

Posted on Jul 10, 2017

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Posted on Jan 02, 2017

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SOURCE: ES 300 servicing: Lexus Dealer vs. Toyota Dealer

no there is not really a downside dealers are good it doesn't really matter who does it but lexus is more familiar with lexus vehicles than toyota because they specialize in it but something like that is simple .

Posted on Feb 12, 2009

  • 36 Answers

SOURCE: 92 lexus es300 knock sensor

Need to remove the upper and lower air intake manifold.  There are two knock sensors for the front and rear pistons banks.  If you plan to do this yourself it is about 1 to 2 hours.  While you are at it, there is a short coolant bypass hose sitting in the same spot, replace it.  Another problem with the knock sensor is the wire harness used to connect the two knock sensors into one connection sometimes wears out and contacts the metal on the engine causing false signals to the ECM, so replace this cable also.
Just did this last summer on my 99 ES300.  Pretty easy.
DIYr

Posted on Mar 16, 2009

bunnydawg
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SOURCE: How many O2 sensors on a 1997 Lexus ES 300?

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

  • 15 Answers

SOURCE: blown fuse 2007 lexus es 350

im not exactly sure which side is on, i always get confused with diff models. but i know is either on the driver or passanger side fuse box. the box is located underneath the dash on the to the left of the brake pedel if its the passanger side its same place bot to the right

Posted on May 07, 2009

  • 1 Answer

SOURCE: car keys locked in trunk of 1999 lexus es 300

1. I presume your button on the dash (which opens the trunk) is not working. You could take that button out of the dash panel and manually activate the circuit by using the wires themselves.
2. If the "valet" key doesn't fit the trunk lock, see if the keys are visible through the center back seat access 'hole', make a wire hook attached to a broom handle, etc. and try to catch the ring the key is on. If the view is blocked by other things you can't move, figure out at way to move things in the trunk so you can get something to reach the key(s). Do you have other metal keys on the same keyring? If so, use a magnet to grab the whole set.
3. Have you considered taking out the rear seat? Do the bottom seat cushion first, then the back.
4. By now you have hopefully already gotten your keys back out of the trunk, but if not I hope one of these suggestions works. MW

Posted on May 12, 2009

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1 Answer

Check engine on 2000 lexus es300 come and going codes found p0300,p0302,p0304 whats happen?


check your spark plugs code 300 means random misfire 302 and 304 indicate spark plug 2 and 4 are not functioning properly check and replace

Dec 02, 2013 | 1999 Lexus ES 300

1 Answer

98 es 300 read a code of p0420,what could cause this to come up as a false reading?


PO420 & PO430 --are worn out Exhaust Converters

You can research any Generic OBD2 Codes on the
internet & learn more than you need to know

A Converter is only good for 12 years & will only pass
inspection MAYBE for 14 years

O2 Sensor Codes are PO170 thru PO 175, so you
may want to study on your own, as you were given
useless advice

Sep 05, 2012 | 1999 Lexus ES 300

1 Answer

How many catalytic converts do my lexus es 300 have


im pretty sure it has only one. most vehicles do!

Aug 14, 2011 | 1999 Lexus ES 300

1 Answer

Check engine lights came on, es 300 lexus,1999, constantly blinking, run rough at slow speed


A constantly blinking check engine light means you have a misfiring engine that is bad enough to cause your catalytic converter to go bad! Take it to the shop... probably means ignition parts and the upper manifold has to come off... and that's no fun! Good luck.

Nov 17, 2010 | 1999 Lexus ES 300

2 Answers

My son's 1999 Lexus ES 300 has a code of P0420 and the check engine light is on. Please help as he has replaced several things and he still has a check engine light on


a common problem is the vacuum switching valves on the charcoal canister. These are small electrical solenoids with 2 vacuum hoses going to them. When you put power and ground to them they should click. Otherwise make sure there isn't a vacuum hose disconnected by the air cleaner box.

Oct 20, 2010 | 1999 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

I have problem on lexus es 300 99 year, when i driving at 70 miles my rpm is going to 4000. My overdrive it does not work. I have check engine light and its code is knock sensor bank 2.


My Lexus es 300 most often when engine is warm will not shift in to last gear. Stop engine start it will shift ok when engine is cool. engine pings kock senores. When in gear at high speed the car runs like new?? Car run bad in hot weather. VSC light on. Red light looks a circle with red line through it comes on not always..

Sep 03, 2010 | 1999 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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