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P0574 is a diagnostic trouble code (DTC) for "Cruise Control System - Vehicle Speed Too High". 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. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
A P0574 trouble code signifies that the Powertrain Control Module (PCM) has detected that the vehicle is traveling in excess of the maximum allowable speed for the cruise control system. Other related cruise control trouble codes include a P0575, P0576, P0577, P0578, P0579, P0580, P0581, P0582, P0582, P0584, P0585, P0586, P0587, P0588, P0589, P0590, P0591, P0592, P0592, P0594, and P0595 code.
When driving using the cruise control, the PCM works in tandem with the cruise control module to assure that the vehicle travels at the speed set. If the PCM detects an abnormality, such as the vehicle exceeding the speed limit allowed by the cruise control system, then it runs a self test of the entire cruise control system in order to try and find the source of the problem. In addition, the PCM stores a P0574 trouble code and the Check Engine light illuminates.
While shorted, open, corroded, or otherwise damaged wiring and connectors are some of the causes of the storage of a P0574 trouble code, attempting to set the cruise control while driving at excessive speeds can also cause storage of this code. Blown fuses can also cause a P0574 trouble code, though this is also an indicator of a much more severe problem.
Symptoms of a P0574 trouble code include the inability to set the vehicle speed via the vehicle's cruise control. If a P0574 trouble code is stored by the PCM, the Check Engine light is also usually illuminated. In some cases, such as with certain models of vehicles, multiple drive cycles are required before the Check Engine light illuminates. But, in some specific models, the Check Engine light is not illuminated at all for such codes.
To properly diagnose a P0574 trouble code, a mechanic needs an advanced scanner and a digital volt/ohm meter. The mechanic also needs to perform the following steps:
A common mistake among mechanics diagnosing a P0574 trouble code is to overlook a blown fuse, replacing components unnecessarily. As a result, the problem is not fixed and the P0574 trouble code returns.
The biggest issue arising out of the storage of the P0574 trouble code is that the cruise control refuses to be set. If cruise control use is important to a vehicle owner, then they need to get the problem fixed in order to clear the code and resume normal use of the cruise control system.
A mechanic can fix a P0574 trouble code by performing the following repairs:
Replace the cruise control switches if testing determines any are faulty.
Replace any blown fuses. The mechanic should also determine the cause of the blown fuse and make the appropriate repairs before proceeding further.
Replace the cruise control ON/OFF switch if faulty.
YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6220.