Question about 2004 Buick Rendezvous

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Service engine light on - 2004 Buick Rendezvous

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Your vehicle’s computer system has self-testing capability. When the computer senses that there is a problem with one of the components or sensors it stores the correspondent trouble code(s) in its memory and lights up the "Check Engine" or "Service Engine Soon" light to tell you that there is a problem and you need to diagnosed and repaired it. The list of possible codes number in the hundreds. The code itself doesn't tell exactly what component is defective - it only indicates where to look, or what engine parameter is out of normal range. You or a technician will have to perform further testing to pinpoint cause and the proper repair. Even if you reset the light, if the underlying problem is not addressed it will come back on.

Posted on Mar 06, 2009

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If you recently put gas in your car the cap might not be tight, try removing and reinstalling fuel cap, it took care of my problem.

Posted on Apr 07, 2009

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1. Put the ignition on to pos.1 and press down the trip reset button on the instrument cluster and keep it depressed.
2. Put the ignition on to pos.2,
3. When the service light starts to flash then release the trip reset button. Now you have reset the service reminder lamp.

You need to read out the DTC's from ECM to be able to fix the check engine light.

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