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You need a good auto-electrician with a pro grade scan tool computer to read the ECM you have. It is possible that features can be turned on. Really though this is a job for the dealership with their factory software,
https://www.obd-codes.com/p0571 ----- P0571 is a generic OBD-II diagnostic trouble code (DTC) that the engine control module (ECM) generates. The P0571 code is defined as a "cruise control / brake switch ' A' circuit malfunction." The letter 'A' can refer to a specific wiring, harness, connector, and so on.
Cruise control only maintains speed by utilizing the accelerator. To speed up it increases it and during slowing is removes it. The cruise control will not apply brakes in the event of a steep downhill run. In this case the vehicle will start to accelerate in the same manner as if the cruise control was not engaged. But in theses cases, most cruise controls, once the speed exceeds a certain amount above the set speed, will auto-disengage as a safety feature.
I would start with the cruise control relay first ! it may be getting hot and shutting down. Then check the cruise control fuse. If all is ok! Then purchase a Haynes manual for your specific vehicle. It shows a lot of info, for your vehicle. You can get the manual at any auto parts store for about $ 20.00. God- Bless! Hope this helps.
Bummer deal! This may be a way to tell you some tail lights are burnt out. Some cruise controls have a fuse in a second location.
The fuse is not in right or is blown. Check with a new fuse. Hope this helps. ...gc http://www.auto-tune-up-and-repair-options.com/
Once you have turned your cruise control on accelerate to desired speed press SET button on right hand side of steering wheel before lifting foot from accelerator, then remove foot from accelerator. pushing RESUME button will deactivate cruise control without turning it off. Then when clear of traffic push resume again to activate cruise control. It will automatically resume to previous set speed.
open the hood and check to see that the throttle cables are not out of place, if everything looks ok then unhook the cruise control cable from the throttle body (black plastic end) by pulling up on the cable end. this will disable your cruise control from making your car accelerate at unwanted times. sounds like there may be a problem with the cruise control servo.
Go to Auto Zone for a FREE scan of your vehicles computer. It sounds like the vehicle speed sensor control (VSS) for your trans is bad. They will find out exacxtly what the problem is if so. The VSS is linked to your computer for the cruise as well
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