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Discussion Starter #1
I have a 2007 Chevy Cobalt. I drove it to work today with no problems. When I cranked it up this evening to go home the service light came on. I stopped by Auto Zone and the guy said my throttle position sensor was the problem. I searched online at Auto Zone, Advance Auto, Oreilys and a few other parts store but can't find the sensor. I read somewhere that the throttle body has to be replaced instead of replacing the sensor itself, is this so? The car is still running perfect and doesn't appear to have any trouble except the service light is on. Is there a test I can perform to determine the sensor is actually bad? I haven't checked for loose wires or anything yet because I wanted to get this posted asap to give everyone more time to respond while i'm looking because I need to use the car again tomorrow. Like I said earlier,it's running good "now" but don't know how long before the problem gets worse. Any advice???
 

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The throttle body is all electronic and everything is internal so I'd it is bad you need to swap throttle bodies, with that said there are ways to test it I'm sure but I don't know how. Someone else will probably chime in though. One thing you could try is checking if it's dirty and needs to be cleaned, don't know if that causes it to throw that code but they are prone to getting dirty.

---------- Post added at 10:08 PM ---------- Previous post was at 10:07 PM ----------

Just unhook the battery before you go messing with the throttle body at all
 

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What was the code? Because it could also be the pedal position sensor.
 

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The throttle body is all electronic and everything is internal so I'd it is bad you need to swap throttle bodies, with that said there are ways to test it I'm sure but I don't know how. Someone else will probably chime in though. One thing you could try is checking if it's dirty and needs to be cleaned, don't know if that causes it to throw that code but they are prone to getting dirty.

---------- Post added at 10:08 PM ---------- Previous post was at 10:07 PM ----------

Just unhook the battery before you go messing with the throttle body at all
Or just unplug the throttle body.
 

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Discussion Starter #5
Thanks rrob5382, Coby7, and Parthors for responding. I'm not sure of the code,the guy at Auto Zone connected his computer to the car then told me the throttle position sensor was bad. Would moisture affect this sensor? As stated earlier the light was not on while I was going to work. Ten hours later,when leaving work the light came on as soon as the car started. It has been raining almost everyday and although I had not driven anywhere,so therefore I did not hit any puddles of water to splash up around the engine,there is a lot of moisture in the air. The light stayed on until I got home,which is about 20 miles. The next morning when I started the car, the light was off and hasn't came back on yet. The vehicle has been running great even while the light was on so since the light has gone off should I go with the theory, " if it's not broke don't fix it," or is this a warning sign that I should not ignore? Thanks
 

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I would wait until the code comes back if it does. Then record the actual code if you want us to help.
 

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It's impossible to diagnose a problem with zero symptoms, if it's not giving you any kind of trouble just let it be.
 

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Plus the code might have just been a glitch. A piece of dirt on one of the 2 wipers either on the throttle position sensor or the gas pedal position sensor.
 
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