Question about 2002 Buick Rendezvous

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I have the same exact problem, once the 2002 Buick rendezvous gets hot it won't start till it cools down. Forget about any diagnostic codes, Buick dealer told me there is nothing he can find. The fan answer above I'll check into, also I believe there is an engine temp sensor somewhere that is not working.

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Hi usually the symptoms your having are a result of the oxygen sensor(or lambda sensor for its technical name) being at fault.

now the reason it points to this being at fault is that it only starts working when the engine is near normal temp then if the car wont start till its cooled down then this is because the sensor then stops working when its cooled down so your car will run again until it gets hot,

you need to check where the sensor is located in the exhaust if it comes before the catalytic converter then the chances are its the sensor at fault but if it comes after the cat then it could be the cat that is at fault.

my best guess would be the sensor as your car is playing up exactly as if this sensor was not working.

i hope this is some help to you

let me know if you need further assistance ok

plz rate this solution as i have a whole page of unrated posts, thanks

Posted on Sep 16, 2010

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