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P0756 is a diagnostic trouble code (DTC) for "Shift Solenoid B Performance or Stuck Off/2-3 Shift Solenoid Valve Performance". 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 $79.99. 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.
If a vehicle’s PCM (Powertrain Control Module) records a trouble code of P0756, it’s because the solenoid is stuck.
Solenoids are common throughout every modern vehicle and are a deceptively simple and vital component necessary for it to work. A solenoid is just a cylindrical coil of wire. It’s used as a magnet for carrying electric current which should help explain why contemporary automobiles use so many. Code P0756 means that the vehicle’s PCM sensed an irregularity in shift solenoid B, which is located in the transmission. As a computer-controlled transmission, shift solenoids are used to manage how fluid is transferred from hydraulic circuit to hydraulic circuit. This transfer is how a change in gear occurs in an automatic transmission.
Therefore, these solenoids make it possible to change speed, get better fuel efficiency and, basically, ensure the highest level of engine performance. That’s why the PCM pays attention to how shift solenoids are operating. These solenoids determine gear ratio based on engine load, throttle position, vehicle speed and engine speed.
There are a number of causes that could be behind this code appearing. They are:
Despite how important solenoids are to the operation of an automobile, a P0756 code can be logged without any noticeable symptoms tipping off the driver. That being said, some very clear signs may manifest as well. These would be things like:
Diagnosing the issue isn’t difficult. A mechanic will:
Solenoid B may need to be replaced, but it’s a mistake to do so and then assume the problem is solved. All four of the above steps must be followed to get to the root of the issue or it might just reappear in a matter of months.
Although the owner may not even realize that solenoid B is not working correctly, this is still a pretty serious problem. For one thing, it could easily evolve into something far worse if not treated in a timely manner. Any time your gears aren’t working correctly, the entire transmission is at risk. Furthermore, though it won’t put your life in danger, if solenoid B isn’t doing its job, your vehicle is probably going to be impossible to drive, especially if it goes into limp-in mode.
Usually, replacing the solenoid or its wiring will be enough. Otherwise, changing out the transmission fluid will often do it.
Even if you can manage to shift gears, if you know there is a problem with any solenoid related to your transmission, you don’t want to push it. Your problem could go from being a minor annoyance to dangerous while you’re on the road.
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.