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P0759 is a diagnostic trouble code (DTC) for "Shift Solenoid B Intermittent". 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 P0759 code means that the powertrain control module (PCM) has detected that there is an irregularity in shift solenoid A. Other shift solenoid codes may accompany this code, such as P0754.
The OBD-II generic code for a problem in vehicles with automatic transmissions, the P0759 code means that the shift solenoid B may not be properly managing fluid levels between its hydraulic circuits. This may be preventing the vehicle's transition from adjusting properly, which can cause problems in acceleration or deceleration, fuel efficiency and engine performance.
The P0759 may have no symptoms, but may also cause the transmission to slip, to shift heavily, and to overheat. The vehicle's transmission controller may also move into "limp in" mode in order to prevent the engine from being damaged.
A P0759 code will be diagnosed with the OBD-II scanner. It is advisable that the freeze frame data is used to recognize when the code appeared, noting any codes relating to transmission and temperature that may have appeared prior to it. The mechanic will then reset the codes and do a road test to determine if the code returns. If so, the next step is to check the transmission, beginning with fluid levels and conditions.
Look for indications of burnt fluid, and if there are odors and burnt fluid, it is important to drop the transmission pan and look for debris, as this means a rebuild is required. If there is no debris, it is likely that the problem is due to a fault in the system's wiring and connections, and the full internal transmission harness may need to be replaced before another diagnostic is run.
It is not unusual for mechanics to mistakenly identify the shift solenoid as the problem, replacing it and yet seeing the code return. This is because the issue is more often the shift solenoid circuitry and not the solenoid itself.
A P0759 code does prevent the car from operating, but it can come with dangerous symptoms, including overheating, engine problems, and issues with vehicle control. If serious enough, it can lead to costly transmission rebuilds.
The P0759 code is dealt with using these repairs:
If the diagnostics and inspections fail to yield results, and the code still appears, it can be that the vehicle is in need of a new pump. This can be determined through the use of a manual pressure gauge, with the readings compared to the vehicle manufacturer's suggested specifications.
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 1-800-701-6230.