A shift solenoid is an electromagnet that regulates hydraulic pressure by opening or closing the solenoid valve. The powertrain control module (PCM) controls it, and it plays an important role in maximizing transmission performance. If the PCM detects a problem with the shift solenoid, on-board diagnostics will log a P0768 code.
Diagnostic trouble code (DTC) P0768 stands for “Shift Solenoid ‘D’ Electrical.”
A shift solenoid is used in electronically controlled automatic transmissions/transaxles. The number of solenoids a vehicle has depends on the number of gears.
The shift solenoid has a spring-loaded plunger that opens or closes a hydraulic valve once current flows through it. The solenoid loses its magnetism when the current isn’t flowing through the wire.
Depending on the PCM’s command, this part can prevent or let fluid flow between hydraulic circuits. By regulating hydraulic pressure, the shift solenoid helps the PCM determine the right time to change the transmission gear ratio, which lets the engine perform efficiently at the lowest RPM possible.
Once the engine computer detects a malfunction in the shift solenoid, it will log a P0768 code. In this case, “D” represents the fourth shift solenoid. In some cases, shift solenoids can also be labeled numerically.
Note: The definition of code P0768 might be different depending on the vehicle manufacturer. Consult the appropriate repair manual or repair database for the exact code definition.
DTC P0768 is a generic powertrain code that can be logged in various makes and models. However, keep in mind that vehicle specifications can require additional steps or protocols when diagnosing such code.
Diagnosing a DTC P0768 typically involves using a digital multimeter and other tools. So if you’re not familiar with the process, it might be best to have a certified mechanic diagnose your vehicle instead. Otherwise, you can go ahead and do it yourself. Check out the video below to get an idea of what the process usually involves.
Attempting to fix a P0768 code can be frustrating without the right tools and automotive know-how. Under these circumstances, it might be best to leave the job to the pros.
But if you have enough experience in resolving trouble codes, make sure to have the right guides before proceeding. Guides like those from Chilton or an ALLDATA subscription contain vehicle-specific repair information. So you might want to check those out before you begin working on your daily driver.
Any information provided on this Website is for informational purposes only and is not intended to replace consultation with a professional mechanic. The accuracy and timeliness of the information may change from the time of publication.
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