Question about 2002 Toyota Highlander

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Toyota Highlander Catalytic Converter

When I drive my Highlander over 100 miles at highway speeds, my service light comes on. I have not had repairs done mainly because estimates from a Toyota Dealer were over $2000. More recently the estimates are down, under $400.

The dealers say that the problem is with the catalytic converter. But if we drive locally for a while the light goes out. We are also aware that Toyota has issued recalls on the On Board computer.

The question is should we have it repaired? Is it possible that that we are just getting a false error report ?

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  • jtaddiken Jan 07, 2009

    I don't know the code. All I know is that the problem was the Catalytic Converter

  • ppk8 Mar 06, 2009

    Similar Problem: I also have a 2002 Highlander (~105K miles) and the check engine light recently came on. My mechanic scanned the codes as PO420 & PO430 both dealing w/ the catalytic system efficiency threshold being low. He reset the sensor and told me this problem is sometimes intermittent. If it comes on again the catalytic converter module system may need to be replaced - for Toyota this part may run close to $1K :-O

    Unlike the previous writer, I did not drive at higher speeds before the sensor light came on but I noticed it happened the day after I fueled up. I did not tighten the gasket 100% so not sure if this may have triggered anything? Mechanic didn't think this was likely.

  • yadayada
    yadayada May 11, 2010


  • yadayada
    yadayada May 11, 2010

    without the system trouble codes to look at I can't give u a correct answer, please provide the codes that prompted the dealer to want 2000 in repairs and why the drastic diff in the second estimate, some outside shop? I would be more leary of the low ball, that is most likely to get u in the door, been in the business 30 years, have seen this scenario many times.



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You should have the Catalytic Converter replaced at a muffler shop,not a dealer.
Then if you still have a problem have the dealer replace the computer(if it was a recall, it will be free)

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Posted on Jan 16, 2009


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