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P0571 is a diagnostic trouble code (DTC) for "Cruise Control/Brake Switch A Circuit Malfunction". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $114.99 . Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.0 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
The P0571 code identifies a problem with the switch that deactivates the cruise control when the brake pedal is pressed.
P0571 is the OBD-II generic code for a problem with the switch connected to the brake pedal that deactivates the cruise control system in the vehicle. If this switch is not functional, the cruise control may not operate.
The brake switch code may have several causes:
The P0571 code will cause the check engine light to illuminate on the dashboard. Aside from that, symptoms may include a non-operational cruise control system. The brake pedal may not be able to deactivate the cruise control once it has been set.
The P0571 code is diagnosed with an OBD-II code scanner that is capable of seeing the information coming from the engine in real-time. A qualified technician will observe when the code first appeared before clearing the code and test driving the vehicle. If the code does not immediately come back, it may just be an intermittent problem with wiring or electrical connections.
If the code does come back immediately, then further diagnosis will be necessary. The technician will use a multimeter to test the circuit for any bad signals.
Since the root f the P0571 is usually an electrical problem, it is important to not overlook the little things like the fuses or the buttons on the dashboard that control the cruise control system. A problem with these components can cause the P0571 code to appear even when the brake switch is in working order.
While the P0571 code is not particularly serious all by itself, it may appear alongside other codes in the event of a serious issue with the brake pedal or cruise control. The worst-case scenario just involves the cruise control system becoming non-operational until the code goes away for good.
The most common potential repairs to address the P0571 code are as follows:
Many times, the P0571 code is caused by liquids being spilled in the interior of the vehicle. The liquid can get into the controls for the cruise control and cause corrosion and/or a short circuit. In these instances, the problem is within the control for the cruise control system.
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