OBD 2 CODE P0121

  • Tiny
  • Samms21
  • 2007 Chevrolet Cobalt
  • 4 CYL
  • FWD
  • automatic
  • 92,000 miles

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?

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Tuesday, August 30th, 2011 AT 5:27 PM

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  • Tiny
  • saturntech9
  • Expert
  • 29,865 posts

It has to be diagnosed before you change anything do you have a scan tool that can read live engine data and a multimeter?

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Tuesday, August 30th, 2011 AT 6:14 PM
  • Tiny
  • Samms21
  • Member

I cleared the code now the engine won't idle normal and the throttle seems super sensitive

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Tuesday, August 30th, 2011 AT 7:57 PM
  • Tiny
  • rasmataz
  • Member

Clean out the idle air control valve and see what happens

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Tuesday, August 30th, 2011 AT 8:17 PM
  • Tiny
  • Samms21
  • Member

Not sure where that is

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Tuesday, August 30th, 2011 AT 8:38 PM

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