What is this sensor on the throttle body?

225

Asked by Chris Apr 01, 2020 at 05:44 PM about the 2001 GMC Jimmy 4 Dr SLT SUV 4WD

Question type: Maintenance & Repair

What is this sensor on the back of the throttle body
on my 2001 GMC Jimmy SLT

3 Answers
157,895

James answered 4 years ago

That's your IAC (Idle Air Control) valve. It has a plunger on the inside that moves in and out to control the idle speed. Hope that helps! Jim

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Guru6M155 answered 4 years ago

Regulates the idle rpm. Iac can get dirty and plugged. Also I've come across iac valve where the plunger cracks and reacts like a vacuum leak. Most of the time when the plunger cracks it makes trumpet like sound coming from intake tube. Mainly Ford's have this issue.

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