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1999 Toyota Tacoma Question: Check engine light on



, 2.7L 4 Cylinder, Greenfield, IN, October 24, 2010, 09:21

My check engine light came on and got a code PO125. They say it's the ECT sensor. Is that located at the back of the engine? Is that the cause of the check engine? It seems to run great as is.

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  • Answer #1

    October 24, 2010, 12:44

    The code helps to point you in a direction. This can be from a bad sensor, bad wire, poor connection, thermostat etc.
    Here is some info about this fault: http://repairpal.com/OBD-II-Code-P0125
    My experience tells me this is a thermostat, are you seeing that the engine is not warming up to operating temperature or it takes a long time to do so? If so, replace the thermostat and reset the check engine light.
    Good Luck

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    , October 30, 2010, 09:02

    It seems to warm up fine. As to how long, I don't thing it takes more than normal. I can try thermostat first and see, since cost is not that great. If that doesn't work should I try the senor next? Is that sensor on the back side of the block? Thanks for helping me.


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