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P0747 is a diagnostic trouble code (DTC) for "Pressure Control Solenoid Stuck On". 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.
The PCM will store the P0747 code when an abnormal reading from the electronic pressure control solenoid, or the related circuit, is detected.
In order to monitor gear shift changes and fluid pressure in the transmission, the PCM relies on data from the pressure control solenoid. If the transmission pressure doesn’t align with the manufacturer’s specifications, it is likely that the gear shift operation will not perform correctly. In this case, the PCM will store the P0747 code.
A faulty electronic pressure control solenoid is the most likely cause of this code; however, other causes may include:
Symptoms of the P0747 code might be completely unobservable. However, some vehicle owners may experience:
After an OBD-II scanner detects the P0747 code, a technician will perform a thorough visual inspection of the transmission fluid. If it is low, it should be refilled; if the fluid is dirty, contaminated with debris, or smells like it is burnt, the entire system needs to be flushed, and refilled with clean fluid.
At each step, the mechanic should be sure to clear the code from the PCM and retest the system; if the code does not reappear, it’s likely that the issue has been resolved, and no further repairs will be necessary. After performing this task, the mechanic should inspect all electrical components, repairing or replacing any wiring or connectors as necessary. The technician should then continue diagnosing the pressure control components until the fault is discovered.
The most common mistake that technicians report with the P0747 code is replacing the high pressure pump, when the solenoid or the electrical wiring are more commonly to blame.
Because this code relates directly to the operation of the shifting function, it is considered a high-priority issue that should be repaired as soon as possible. If the issue behind the P0747 code is not addressed immediately, it can cause major malfunctions.
Addressing a P0747 code detection may include any of the following repairs:
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