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How do you know if both oxygen sensors need to be changes on your 98 Toyota Tacoma?
Wiki User
∙ 15y ago
i had to change both when my truck decided to not want to idle, at all. scanning it always said cat below threshold (meaning the cats were bad but not the case) after replacing i drove it for about 3 tankfulls and after the computer learned the new sensors and it ran flawless after that.
Wiki User
∙ 15y ago
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