ES - 1st to 4th Gen (1990-2006) Forum for all 1990 - 2006 ES300 and ES330 models. ES250 topics go here as well.

Need help please

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Old 06-10-17, 09:20 AM
  #1  
ameer90
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Default Need help please

Hello

I have Lexus es300 model 2000
The problem is that I feel my car very slow and its acceleration is very bad.

I replaced many things but I still have the problem

I removed catalytic converter
When I do computer check

I have p0420
I think I have oxygen sensor problem

But which sensor it is?
There are two

Please help me

Old 06-11-17, 01:41 PM
  #2  
nsghtbrwry
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With slow acceleration and a P0420, I'm willing to be you have a clogged catalytic converter. It will be loud, but you can test it by removing the upstream O2 sensor(s) and driving it. If it accelerates normally, you have a clogged cat.
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