Question about 2002 Buick Rendezvous

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I have a question wrapped in a concern regarding my Buick Rendezvous. Just within the last couple of days, I have noticed that when I am in park and while stopped...let's say in an intersection, the idle ramps up to an unprecedented 3000rpm. I know this is not normal. My question to you: what is causing this and what can be done about it. If it is something serious, how soon should I have someone look at it and how much do you think the repair cost might be? Thank you for your time.

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Good Evening, from the sounds of it you might have a vacuum leak (which those motors are known to have even in their car counterparts) or an idle air control valve that is sticking. Depending on which it may be. A little more info such as if it does it when you start up or only after it warms up will be helpful to diagnose. Hope this helps.

Posted on Sep 12, 2010

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Posted on Jan 02, 2017

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When ever i start to go from being parked my traction control comes on, only lasts for a few seconds. It happens on paved parkinglot, gravel. it doesnt happen all the time maybe once or twice for a couple...


Did you have "diagnostics" performed, or did you just have somebody pull OBD codes from your engine computer? Trust me, there is a BIG difference! Most traction control fault codes will not show up on a generic OBD scan tool. You need to scan your Antilock Brake System (ABS) module as well as perform a "vehicle-specific" scan on your Powertrain Control Module (PCM). (This cannot be done at your local parts store.)

There is also a Technical Service Bulletin (TSB) published by General Motors concerning intermittent traction control and other possible problems due to water getting into connector C305 and causing electrical short circuits. TSB Reference Number: 01-08-45-005E (Checking for this TSB SHOULD have been included in any attempt at a "diagnosis"). This TSB may or may not have any relation to your problem, but a thorough diagnostic check will verify this.

If this is happening when your tires are slipping on gravel in a paved parking lot, it may be perfectly normal operation. In this case, your traction control is only telling you that it is taking control of the wheel slip - especially if it happens when you are accelerating quickly.

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