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2007 Toyota Corolla Question: Check Engine Sign - Code P0138 - pops up summer time and goes away

 

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rafieagle, West Hempstead, NY, August 06, 2012, 10:14
 Rookie

The sign pops up during summer time (about this time) and goes away after a day or two. This has been happening for the last two years. Each summer it happened about two times. There was a recall of ECM module two years ago which was replaced by the dealer then. Can you help me narrow down the exact probable cause?

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  • Answer #1

    Greg's Orange Auto (8805 Answers) , Orange, CA - (714) 361-9355
    globalhelper August 06, 2012, 12:38
     Master

    o2 sensor bank 1 sensor 2 has high voltage, poss sensor issue

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    rafieagle, August 06, 2012, 12:46
     Rookie

    When checking the code P0138, I found 4 or 5 probable causes and O2 sensor was one of them. How positive are you with this selection? I appreciate your answer. If I know for sure O2 sensor is the reason, it can certainly minimize my additional costs . Thanks

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    globalhelper, August 06, 2012, 18:43
     Master

    it can be sensor or circuit the cofe only lets u know what circuit is failing not what part to change. you need to read with a scanner or test manually.

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    rafieagle, August 07, 2012, 06:18
     Rookie

    How do I do this? Can you elaborate on this? All I know that code P0138 was displayed when checked with a scanner at Autozone. A little more in depth explanation will help me a lot. Thanks for your time.

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    globalhelper, August 07, 2012, 09:45
     Master

    you need to seek help on this matter

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