OBD 2 Code P0121

2007 CHEVROLET COBALT
92,000 MILES • 4 CYL • FWD • AUTOMATIC
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SAMMS21
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I am getting a check engine light that pulls code P0121 it said something about Throttle position sensor circuit performance range. Does that mean my throttle position sensor is going bad? Is this something I can replace myself?
Aug 30, 2011 at 5:27 PM
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SATURNTECH9
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It has to be diagnosed before you change anything do you have a scan tool that can read live engine data and a multimeter?
Aug 30, 2011 at 6:14 PM
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SAMMS21
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i cleared the code now the engine won't idle normal and the throttle seems super sensitive
Aug 30, 2011 at 7:57 PM
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RASMATAZ
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Clean out the idle air control valve and see what happens
Aug 30, 2011 at 8:17 PM
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SAMMS21
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not sure where that is
Aug 30, 2011 at 8:38 PM