i have a 2007 cobalt ls and the check engine light came on i put it on the computer and it said i need to replace the throttle position sensor can i just change the sensor or do i have to replace the throttle body also? the sensor looks like it has four clips holding it on but i dont know if they can be removed. i checked the part on line and ebay has the whole thing for $250.00 but i looked up just the sensor at local auto parts dealer and the sensor is between $35.00 and $55.00 but they say universal and may fit.