Question about Toyota Tacoma

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I have a 2003 tacoma pick up truck and the check engine light went on. I took it to my mechanic and he said the p0420 code came up and it was a catalytic converter. I only have 38,000 miles on it so he said to take it to my local Toyota dealer and they could fix it. No charge from mechanic. I took it to Toyota and they said the rear oxygen sensor was bad. They charged $82 and said that the code really doesn't distinguish between the forward or rear oxygen sensors and that it took them an hour to determine everything. Is there any way I can be sure they are not trying to avoid fixing my converter and just placing the blame on the oxygen sensor. The converter is a free fix, the oxygen sensor is a few hundred. Appreciate any help you can give on this. Thanks Joe

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Well, the P0420 means "Catalyst System Efficiency Below Threshold (Bank 1)" - that both oxygen sensors (the one before the converter and the one after the converter) are reading about the same, meaning the converter is not working within the set efficiency envelope.

the "Bank 1" is just a way to differentiate between right and left for dual exhaust and dual catalytic converters - Bank 1 or Bank 2

Then they have (Bank 1 Sensor 1) (Bank 1 Sensor 2) (Bank 2 Sensor 1) (Bank 2 Sensor 2)

In any event, it sounds like Toyota was correct, but, WOW , A few hundred? Considering the Oxygen Sensors cost between $124 and $194 (front or rear) - you can safely say the part will cost $200 - even at the local parts house. Then the shop labor - which will NOT take more than 20 mins to replace since they nailed which one needs replacing. Unless its a ****** doing it. They have shop minimums though I'm sure.

Good Luck and Take Care

Posted on Oct 08, 2010

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Please rate this solution thanks

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