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Tiny
KNEEPADSLH
  • MEMBER
  • 1999 PONTIAC GRAND PRIX
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 168,543 MILES
Car runs fine while driving etc ever now and then its stalls I use my scan tool and got code po 120 low out put on circuit a and o2 sensor code no signal from o2 sensor. What will cause po120. And how can I fix it. Help help thanks.
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Tuesday, March 20th, 2012 AT 2:45 AM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,896 POSTS
Check the throttle position sensor
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Tuesday, March 20th, 2012 AT 3:09 AM
Tiny
KNEEPADSLH
  • MEMBER
  • 5 POSTS
Will it be best to replace it or most of the time when this code po120 the tsp is bad
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Tuesday, March 20th, 2012 AT 3:46 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,896 POSTS
Usually it is bad
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Tuesday, March 20th, 2012 AT 3:52 AM

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