What Codes Will This Page Cover?
- P0756 Shift Solenoid “B” Performance/Stuck Off
- P0757 Shift Solenoid “B” Stuck On
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What Is the P0756 Code?
Symptoms
Causes
Seriousness
Can I Still Drive?
Diagnose
Difficulty of Inspecting
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The P0756 and P0757 codes indicate that there’s an issue with one of your shift solenoids. The specific code that you receive will tell you a bit more about the problem; P0756 indicates that the solenoid is stuck “off,” while P0757 indicates that the solenoid is stuck “on.” Both of these codes show a problem with the B solenoid specifically, which is generally located within your vehicle’s transmission.
More About the P0756 and P0757 Codes
Solenoids are deceptively simple vehicle components that are a big part of many modern vehicles. They’re cylindrical coils of wire that are used as electric magnets, often helping a vehicle move certain small components. Shift solenoids specifically move a valve that controls the transmission hydraulic fluid, ensuring that the fluid makes it to the appropriate fluid circuit. Issues with the shift solenoids will cause concerns for your vehicle’s shifting processes.
What Are the Symptoms of a P0756 Code?
There are a number of symptoms that may come along with your P0756 and P0757. Outside of the check engine light turning on, you may experience a number of issues that you might expect from transmission-related issues. That includes Limp Mode, harsh and erratic shifting, your vehicle slipping in and out of gear, your vehicle getting stuck in a specific gear or refusing to move when in gear, general reduced fuel economy, or engine stalling. This may cause a no-start condition or generally make it unsafe for you to drive your vehicle.
What Are Some Causes of a P0756 Code?
The most prominent causes of the P0756 and P0757 codes have to do with concerns surrounding your vehicle’s transmission fluid, which may be low or dirty. Outside of that, you may also see issues with frayed or damaged wiring, problems with the solenoid or transmission pump, and even blockages within the system. In some rare cases, it may be due to failure of the transmission control module (TCM) or engine control unit (ECU), but this is exceedingly rare and will almost always come with other warning signs.
How Serious Is the P0756 Code?
The P0756 and P0757 codes should be considered exceedingly serious. Not only do they cause very serious drivability problems all on their own, but left untreated, they can also lead to complete failure of the transmission. This code is one that you should treat immediately, as treating it early means that you may be able to repair the problem rather than having to replace the transmission entirely.
Can I Still Drive with a P0756 Code?
Many people with the P0756 and P0757 codes will still physically be able to drive their vehicles, but it’s not generally a good idea to do so. While you might not be dealing with a full no-start condition, these codes can still cause serious problems for your vehicle both when you’re driving right now and as you continue to drive. The longer you drive with these codes active, the more likely it is that you’ll experience severe transmission concerns, which can lead to overarching transmission problems that require you to replace the transmission entirely.
How Easy Is It to Diagnose a P0756 Code?
It depends prominently on the underlying causes. If the problem has to do with your transmission fluid, then you may be able to diagnose it surprisingly quickly simply by changing out your transmission fluid. However, if the problem is more difficult to identify, such as issues with the transmission pump or the valve body, you might have a much more difficult time determining what the actual problem is, leading to a much more difficult diagnostic process. Overall, it’s generally accepted that you should try to diagnose these problems with the help of an expert if changing your transmission fluid doesn’t help.
How Difficult Is It to Inspect a P0756 Code?
The inspection process inside a transmission is often difficult, no matter what problem you’re experiencing. Transmissions are critical components of a vehicle, and if you mess up in your inspection, you’re much more likely to experience problems related to your vehicle’s transmission, which is generally a much more difficult and expensive location in the vehicle to fix.
Need Additional Help with Your P0756 Code?
Most people who see these codes will end up needing more help with their engine if they’re looking to fix the problem for good. If you’ve started seeing these codes and a transmission fluid change hasn’t stopped it, you can get help from a local expert.
First, find a repair shop in your area. This will help you get help from someone in your area, so if you’re not comfortable driving your vehicle due to the issues you’re experiencing, you don’t have to go very far.
Additionally, if you’re seeing other codes that give you more insight into the problems you’re experiencing, the KBB OBD-II database will help you understand what those codes really mean for your vehicle.
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