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What sensor is located on the throttle body,directly under the air control senso

(1999 Chevrolet Silverado 1500)
in Salisbury Mills, NY on April 07, 2014
there is two plugs on right side of throttle body,where intake hose is connected,one on top is the air control,i think, the other one is two inches under it,1999 silverado 1500,4.8,V8 VORTEC,4X4
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Popular Answer
of G. T. Service Center on April 07, 2014
Only thing I can think of is the TP sensor and the IAC.
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on April 12, 2014
Yes the iac is On top, so the one under it is the TP, what purpose does it have, can I remove it and clean it, what codes does it cause when bad, I'm a beginner, learning to maintain my own truck,, thank you for ur response
of G. T. Service Center on April 12, 2014
It cannot be cleaned. It tells the computer the throttle angle as you push the pedal.
on April 14, 2014
WOULD IT CAUSE CODE po137,DO YOU KNOW WHAT CODE IT GIVES WHEN BAD,, SO I SHOULDN'T REPLACE IT IF COMP. IS NOT STATING IT,? THANK YOU FOR UR RESPONSE
of G. T. Service Center on April 14, 2014
No; It is a low voltage issue at the o2 sensor or wiring to it.
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