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OBD 2 Code P0121

Tiny
SAMMS21
  • MEMBER
  • 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?
Tuesday, August 30th, 2011 AT 5:27 PM

4 Replies

Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 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
  • 21 POSTS
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
  • MECHANIC
  • 75,992 POSTS
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
  • 21 POSTS
Not sure where that is
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Tuesday, August 30th, 2011 AT 8:38 PM

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