2001 Toyota Camry PO420

133,000 MILES • 4 CYL • FWD • AUTOMATIC
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BIGBODYCHEVROLET
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  • 2 POSTS
First of all its a camry Solara wasn't in the drop down window. Hey I keep getting a PO420. Used to come on about every week. I replaced the rear cat today now it takes about 10 20 miles for the code to come back after I clear it. I torqued the manifold it was ok. I don't hear an exhaust leak anywhere. It has a pre-cat on it. I thought it might be it. don't really know. Both 02 sensors are reading voltage. Any suggestions would be appreciated.
Jan 15, 2008 at 1:06 PM
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BLACKOP555
  • ✓Experienced Mechanic
  • 10,386 POSTS
i would change the pre cat. if that is it your sensor is bad or the pcm is not reading it properly.
Jan 15, 2008 at 1:42 PM
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BIGBODYCHEVROLET
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  • 2 POSTS
is it possible that the cat i got isn't 50 state emissions? which my car has. Can I put a header on where the precat used to be without major complcations? thanks
Jan 15, 2008 at 3:58 PM
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