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Why does my truck idle at around 2000 RPM's but only when my pedal position sensor is hooked up?

Tiny
PICO1022
  • MEMBER
  • 2000 CHEVROLET SILVERADO
  • 130,000 MILES
My truck was throwing the p0122 code for position sensor so I put new sensor on my truck but was still throwing the code on my vehicle and as I was checkin the wires to see if there was a short my truck started idling at 2000 rpm's and so I unplugged the wires and my truck ran really good. I checked the wires on my vom meter and they all seem to be working right and I also changed the computer but nothing is making it idle right with it plugged in.
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Thursday, February 2nd, 2012 AT 1:15 AM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Check the idle air control valve and the throttle position sensor
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Thursday, February 2nd, 2012 AT 1:21 AM
Tiny
PICO1022
  • MEMBER
  • 2 POSTS
I checked the throttle position sensor and is showing as working properly. My truck only idles high whenever the position sensor is plugged in. When I unplug it then it idles fine. Could it still be the idle air control valve doing it?
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Thursday, February 2nd, 2012 AT 1:44 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
I would pull it out and check it.
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Thursday, February 2nd, 2012 AT 2:25 AM

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