Throttle Code P0507 0n 2002 Chevy Trailblazer

Larry

Throttle Code P0507 0n 2002 Chevy Trailblazer

Unread post by Larry » Sun Feb 24, 2013 4:09 pm

I have a 2002 Chevrolet Trailblazer with code P0507. The throttle gose up and down I changed the throttle body , but it still rev up and down.

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ProTech
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Re: Throttle Code P0507 0n 2002 Chevy Trailblazer

Unread post by ProTech » Sun Feb 24, 2013 10:08 pm

The trouble code P0507 is for 'idle speed high' and is usually caused by a bad throttle body or a vacuum leak somewhere. Since you've replaced the throttle body, I'll have to assume it's functioning correctly. You just might want to make sure you installed it correctly and hooked up everything right and the gasket is in place.

If that all checks out, you might want to start looking for other areas that will make the idle high like certain vacuum leaks. There is a technical bulletin from GM about the PCV hose coming disconnected and setting this code, so you might want to look there too, and reconnect it if it's loose, or off. Other than that, it could be an intake gasket leaking, a valve cover gasket, brake booster hose, etc. You'd have to check it out good to find it if it's not something readily visible.
GM Dealer Technician For 18+ Years
In the automotive industry for 20+

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Karl
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Re: Throttle Code P0507 0n 2002 Chevy Trailblazer

Unread post by Karl » Mon Feb 25, 2013 6:09 pm

Check the last post on this link too. It is about the intake vacuum leak on the 4.2L...
viewtopic.php?f=62&t=4743

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