Question about 2001 Buick Regal

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Hi, transmission in 2001 buick regal slipping and stuttering when quickly accelerating. got diagnostic code # P1585C. has to do with the cruise control. what does one have to do with the other? is that just one code that could lead to many different possibilities? is there any way of narrowing it down without a mechanic?

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If the trans is slipping then the problem is real and will need a shop to diagnose this. Unless you are capable of following a diagnostic trouble tree from the manufacture and also have a basic testing meter and a diagnostic scanner there will be nothing you can do at home. You have four possible problems. A engine performance issue, a bad computer, a wiring issue, or a failed transmission or solenoids internal to it. It is not in your best interest to be fixing this yourself.

Posted on Jul 14, 2010

  • Susan Price Jul 14, 2010

    P1585 is a cruise control circuit code

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My car had same problem. Got it to the mechanic, replace a selenoid for $600 (including parts and labor) never had the problem again.

Posted on Aug 18, 2010

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The engine and the automatic transmission in this vehicle are computer controlled and in most cases when a fault occurs a fault code is stored in the memory of the computer control module. There are exception to this, such as the Mass Airflow Meter and fuel pressure problems. What must be done is to have all the basic testing done such as a scan of the system for fault codes as well as a check with a live data scanner tool for engine functions that are not within range of normal, a trained technician is required to know what is correct and what isn't, then based on careful diagnostics done from a factory repair manual the correct part is replaced or the wiring repaired or the computer replaced (known as the PCM), which is very rarely the problem. Other basic checks must be done as well such as mechanical problems with the engine as well as engine state of tune and mileage on the engine. The transmission can have mechanical issues as well such as no gear engagement at all or a failed pump or other pressure related problems.


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