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2000 Toyota 4Runner

Question: check engine light

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dwent, 3.4L V6, Lebanon, PA, March 16, 2010, 16:33

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My check engine light came on, had it checked and code P0120 TPS Sens "A" Circuit malfunction came up. What is the throttle positioning sensor and what can I do to fix the proplem. Light did not come on the next day or not even todat which is 3 weeks.

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• Answer #1

  patrick mannion from Greg Solow's Engine Room, March 16, 2010, 22:41
  

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  The throttle position sensors can fail it is located on the throttle body.A scan tool can read the voltage through the 16 pin socket under the dash without having to do intrusive testing. I would test the sensor first before jumping to conclusions. Autozone have some popular workshop manuals for free on line once you register (for free) on their website http://bit.ly/autozone_repair_info .There is a company that independent auto repair shops "buy" their information from that offer a very reasonable service to do it yourselvers. You get a one year subscription to year make and model specific repair procedures, service bulletins, component locations, wiring diagrams ect.... great quality information same as the professionals have ,much better than generic workshop manuals from parts stores, much cheaper than the factory manual. http://bit.ly/alldata_repair_manuals or try http://bit.ly/mitchell_repair_manuals_online and get an online repair manual subscription.
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