Home Transmission & Drivetrain Transmission Solenoid Fuse – When Can You Find This Fuse?

Transmission Solenoid Fuse – When Can You Find This Fuse?

by Kelvin Yates

Have you started noticing weird symptoms with your transmission, such as your car going into limp mode, and having some difficulty shifting? Well, if that is the case, then you are at the right place because there will be a lot to cover on this topic where we are going to learn everything you need to know about this transmission solenoid fuse.

Transmission problems are a frequent issue with many car owners. Especially on cars equipped with an automatic transmission. Why is this the case? Well, mainly because there are a ton of moving parts that allow the transmission to shift automatically.

So, more parts inside mean more possible problems and more situations where something could go wrong. Such as in our case with the transmission solenoid fuse. Inside each automatic transmission, there are shift solenoids that make the transmission shift properly. And once this component is not properly working, there are a ton of issues that could rise up. But you shouldn’t worry because we are going to help you out.

First, we are going to start with the basics. We will learn how an automatic transmission work and we will cover the solenoid, we will cover its location, and also then we will cover the solenoid fuse and its location.

After that, we will dive into the bad shift solenoid symptoms and cover some of the situations that you could come across when the shift solenoid does not operate as intended by the factory. So, if you want to learn more about this problem, feel free to follow along till the end.

Automatic Transmission

Now before we dive into the transmission solenoid fuse, let’s begin with the basics and understand what is an automatic transmission. Why is this necessary? Well, there are a ton of people reading this article who might be familiar with this problem and want to learn more about the basics.

If you have the grasp of the knowledge needed, you can jump to one of the following chapters. If not, keep up with us while we cover this stuff.

Nevertheless, what is an automatic transmission? Well, in simple terms, an automatic transmission is a giant torque conversion box located inside of your vehicle.

Transmission Solenoid Fuse

There are two main types of transmissions as you probably know. One of them is the manual. Where you go through the gears manually while engaging and disengaging the clutch with your clutch pedal. A rather complex transmission for beginner drivers.

This is why a lot of people in the US prefer to drive an automatic. Mainly because of the ease of use. And as you probably assume, in automatic transmissions, the transmission is doing all the hard work by itself.

You just hop inside of the car and start the engine, put it in drive, and you are good to go. It is that easy. But all this ease of use increases its complexity underneath. And here we come to the transmission solenoid fuse. But more in detail about this fuse we are going to cover later on.

The first thing to do, we need to understand how this transmission works in general. And that’s what we will cover in the following chapter where we are going to elaborate on everything you need to know about how this automatic works.

How Do Automatic Transmissions Work

Now since we familiarized ourselves with the automatic transmission and learned more about the basics. Before we dive into the transmission solenoid fuse, let’s cover something about the method of work that this transmission implements. How does this transmission work in general? Let’s elaborate.

Well, as we noted previously, the automatic transmission does everything automatically. This means that there is no manual action from the driver as in manual transmissions. Where you press the clutch to engage and disengage the transmission.

In automatic transmissions, everything is done by the transmission itself. You only have a brake pedal and a gas pedal. But what happens inside of the transmission?

Well, we can say that inside, a ton of complex processes occur. Inside of the transmission you have a big valve body.

This valve body is a maze-like device. And based on the input that you give to the car with the gas pedal, transmission fluid travels through this maze and applies pressure wherever is needed and this activates the shifting mechanism of the transmission.

Hydraulic fluid is one of the most essential things that the transmission needs in order to operate correctly. And this fluid has to be perfectly clean in order for the transmission to shift well and not create problems. But why hydraulic fluid?

Well, hydraulic fluid allows the transmission to shift well. If you use regular oil, it won’t work because it will get compressed. And ATF or transmission fluid has really good properties for heavy-duty applications that allow it to outperform almost anything out there.

In addition to this, in each automatic, you have complex electronics that regulate the work of this component. And more about what we are going to cover next before we discuss the transmission solenoid fuse.

Transmission Control Solenoid

Since we learned more about the transmission and how it works. Now before we cover the transmission solenoid fuse, we can move on and dive even deeper into its method of action and cover some of the electronics that are used inside of it.

As you probably know, modern automatic transmissions are very complex and implement a ton of electronic components that make them function right.

The main brain of the transmission is the transmission control unit. This unit is something like an ECU for transmission. It comes pre-programmed from the factory for this specific application.

The TCM controls other electronic units inside of the transmission. And the most important device that your shifts depend on is the transmission shift solenoid. There is also a torque converter clutch solenoid that controls the torque converter. But in our case, we are only into the shift solenoid.

The solenoid is a component that has an electrical circuit inside. This device is simply a lock that opens and closes.

So, whenever there is a need for it to open. The TCM will send an electric signal to the shift solenoid. The solenoid will open and allow the ATF fluid to enter the valve body and deliver a shift. Then, as you downshift, the shift solenoid will close and the transmission will go down a gear.

Overall, it is quite easy to understand its method of action. The shift solenoid is something like a regulator that regulates the flow of transmission fluid inside of the transmission. Without this solenoid, proper shifting cannot be done and if one of these solenoids fails, you will end up with only 2 or 3 gears. So, you get the idea why they are so important. As well as the transmission solenoid fuse.

Transmission Control Solenoid Location

Now since we learned more about the transmission shift solenoid and learned that this component is crucial when it comes to proper shifting, we can move on and learn more about its location before we dive into the transmission solenoid fuse.

So, where is this component located in the car? A lot of people think that these solenoids are really accessible and easy to swap out.

But the reality is that they are actually not quite accessible and replacing a solenoid can be a real menace. Especially if you are not an experienced fellow who has been working on cars. Why I’m saying this?

Well, because it is true. The shift solenoid is located on the bottom of the car. More precisely inside of the transmission itself.

These solenoids are mounted on the valve body of the transmission. So, if you really want to replace one of them. The first thing you will need to do is to lift the car in the air. Then drop the transmission pan and drain all the transmission fluid. Only then you will have the access to work on one of these solenoids and test them out with a multimeter.

So, we can say that these solenoids are pretty much soaked in transmission fluid their entire life. And servicing them is a really difficult task that is not something recommended for beginner mechanics.

But luckily, sometimes the solenoids do not fail and the thing that fails is the transmission solenoid fuse. So, what is the transmission solenoid fuse, and where to locate it? More on that, we are going to cover it in the following chapter.

After that, we will dive into the symptoms of a bad shift solenoid and how you can diagnose one if you feel up to the task.

Transmission Solenoid Fuse

Now let’s cover something really important and that is the transmission solenoid fuse. If you didn’t know, each of the solenoids in your transmission has a fuse. But what is a fuse?

Well, a fuse in simple terms is a protection against a high surge of electricity. Each car has fuses and frankly, there are a ton of these in every automobile.

If there were no fuses when something shorts out in your system will cause the wires to melt. Once wires start to melt they can cause a fire inside the car.

And the fuse is there to serve as a protection in these situations to not overload the electrical system because of a faulty component. And since the solenoid is a component that works with 12V of power, it has to have a fuse. So, where is this fuse located?

Well, this is a good question. The fuses are located inside the fusebox. Each car has a fusebox under the dash, as well as inside the engine bay compartment.

For the transmission, fuses are usually located inside the engine bay. There is a big black plastic box that has a cover on it.

What you need to do is to pop up the cover and find the transmission solenoid fuse. And finding these fuses can be really tricky.

So, what you can do is to get the plastic cover of the fuses and see on the opposite side. Usually, there are all the fuses and their function are explained.

If you can’t find this information on the cover, go online and check some diagrams for your specific model. There you can find your information. If the fuse is blown, replace it, if not, move on to the next chapters.

Transmission Solenoid Symptoms

Now since we covered the transmission solenoid fuse and learned more about its purpose and how to find it. We think that now it is time to cover more on the symptoms of bad shift solenoid.

If the fuse was good, then the problem is probably found in the solenoid itself. So, what are the most common symptoms of this issue? Let’s elaborate on them in detail.

Transmission Solenoid Symptoms #1: Check Engine Light

The first and quite common symptom when you have a bad transmission solenoid fuse or a bad solenoid is the check engine light.

The computer is smart enough to notice whenever there is a problem shifting gears. So, he will know this and will tell you that you have a problem with the check engine light.

Transmission Solenoid Fuse

And in order to see what is causing the problem, you need to dive deeper and grab an OBD2 scanner (also, make sure you know how to use OBD2 scanner). With this scanner, you will be able to access the computer of the car and scan the car for codes.

If the scan went well, then you probably don’t have issues. But if there are some codes concerning the transmission or the solenoids themselves, then you definitely need to troubleshoot the problem. And how you can do this, we are going to elaborate later on in the article after we cover all of the bad shift solenoid symptoms. Now let’s move on to the next symptom that can indicate a problem with the solenoid.

Transmission Solenoid Symptoms #2: Erratic Shifting

The second common symptom of a bad transmission solenoid fuse or a bad solenoid is erratic shifting. So, what is erratic shifting?

Well, this can be described as a situation where the gearbox is skipping gears. So, instead of second, you can go into third gear, as well as the transmission can shift back and forth through the gears.

Or even end up stuck in a single gear and refuse to shift up or down. And frankly, this is a situation that you probably don’t want since a car like this is close to impossible to drive and enjoy the driving. Whenever you have a situation like this, it is important to act quickly and sort this thing out accordingly. First, check the transmission solenoid fuse, and then check the solenoid itself.

Transmission Solenoid Symptoms #3: Transmission Doesn’t Downshift

The next situation when you have a bad transmission solenoid fuse or a bad solenoid is the situation when the transmission does not want to downshift. The transmission is stuck into a single gear and does not want to go down. Unless you stop and put the car into park and then back into drive.

This is a really common situation when the solenoids fail and cause problems like these. So, whenever this happens, you should not be alerted that your transmission has failed. The first thing you need to check is to see if the transmission solenoid fuse is good. If it’s not, replace it, if the fuse is good, then definitely the solenoid is the one that creates all the problems.

Transmission Solenoid Symptoms #4: Delay In Shifting

The fourth symptom on our list of symptoms of a transmission solenoid fuse or bad shift solenoid is the delay in shifting.

Whenever the solenoid has failed, you will start to experience huge delays when it comes to shifting gears on your automatic transmission.

This is caused because of a bad solenoid which receives not enough electric current to activate on time. Or possibly because of a very dirty transmission fluid that does not allow the solenoid to open and close correctly. This is one of the main reasons why you should flush your fluid often because it can damage the solenoids inside.

Transmission Solenoid Symptoms #5: Transmission Stuck In Neutral

And the last in our list of symptoms of a bad transmission solenoid fuse or a bad shift solenoid is the case when the transmission is stuck in neutral.

So, what does this mean? Well, this means that the transmission is completely inoperable and you are not able to put it in drive and shift gears.

This is the situation when the car is able to roll freely and not shift gears. And a clear sign that some of your solenoids or fuses that are dedicated to the solenoids have failed. So, in this case, taking your car to the nearest shop to investigate this issue is recommended.

Transmission Solenoid Symptoms #6: Transmission Slipping

Transmission slipping is another common symptom of a bad solenoid. This occurs when the transmission seems to slip out of the gear it’s in and goes into a lower or higher gear without any warning. You may notice the engine revving higher than usual, but the vehicle is not moving at the corresponding speed. This can be dangerous, especially when driving at high speeds as it can cause the vehicle to suddenly slow down.

Transmission Solenoid Symptoms #7: Vehicle Won’t Move

Another critical sign that your transmission solenoid may be failing is when the vehicle refuses to move at all. When you shift into drive or reverse, the car will rev but not move. This could be because the solenoid is not opening or closing properly to allow the transmission to engage the appropriate gear.

Transmission Solenoid Symptoms #8: Harsh or Abrupt Gear Changes

If you notice that your vehicle’s gear changes are harsh or abrupt, it may indicate a problem with the transmission solenoid. Instead of a smooth transition from one gear to another, the vehicle may jerk or lurch during gear changes. This can be due to the solenoid not properly controlling the flow of transmission fluid.

Transmission Solenoid Symptoms #9: Unusual Noises

Unusual noises, such as a buzzing or clicking sound, coming from the transmission area, can indicate a problem with the transmission solenoid. This noise occurs when the solenoid is trying to open or close but is unable to do so.

Transmission Solenoid Symptoms #10: Overheating

Overheating is a less common but critical symptom of a bad transmission solenoid. The solenoid controls the flow of transmission fluid, which is necessary to cool the transmission. If the solenoid is not functioning correctly, it can lead to inadequate transmission fluid flow, causing the transmission to overheat.

Transmission Solenoid Symptoms #11: Poor Fuel Economy

Poor fuel economy can also indicate a problem with the transmission solenoid. If the solenoid is not functioning correctly, it can cause the transmission to stay in a lower gear longer than necessary, which can lead to increased fuel consumption.

In conclusion, recognizing the symptoms of a bad transmission solenoid is crucial for the proper functioning of your vehicle. If you experience any of these symptoms, it is recommended to get your vehicle inspected by a professional immediately. Regular maintenance, including checking and replacing the transmission fluid, can also help prevent solenoid and other transmission-related problems.

But what about the transmission solenoid troubleshooting? What you can do in this case and troubleshoot the transmission? Well, more about that we are going to cover in the following chapter, where we are going to elaborate on this in-depth.

Transmission Solenoid Troubleshooting

Now let’s take a look at the troubleshooting and what you can do to make sure that you tackle this problem without replacing the solenoid.

In these situations, the first thing you will want to do is to locate the fusebox. The fusebox as we mentioned previously is a big black plastic box that contains all of the fuses for your vehicle.

You will need to open this box and locate the fuses for the solenoids. Check them one by one. If one of them is burnt, then replace it with a new one. This will hopefully solve the problem if the issue is because of a bad fuse.

Or if the fuses are all in good condition, then the problem usually lies in bad transmission fluid or bad shift solenoid.

In order to find out more about the possible issue, you will have to drop down the transmission oil pan. Then check the solenoid with a multimeter and see if it works well or not. In some cases, TCM can cause issues like these as well.

This is why we recommend taking the car to a place where they have a lot of experience fixing transmissions. Experienced mechanics will tackle this problem in no time.

Step 1: Check the Wiring

After checking the fuses and the condition of the transmission fluid, if the problem still persists, then you might have to consider other possibilities.

Before concluding that the solenoid is the issue, check the wiring connected to the solenoid. Damaged or loose wiring can cause the solenoid to malfunction. Inspect the wiring for any visible damages, and make sure all connections are secure.

Step 2: Check the Transmission Control Module (TCM)

The Transmission Control Module (TCM) is the computer that controls the transmission. It receives signals from sensors and uses this information to control the transmission solenoid and other parts of the transmission. If the TCM is faulty, it can cause the transmission solenoid to malfunction. Use an OBD2 scanner to check for any codes related to the TCM.

Step 3: Check the Transmission Fluid Pressure

Low transmission fluid pressure can also cause the solenoid to malfunction. Check the transmission fluid pressure using a transmission fluid pressure gauge. If the pressure is too low, it could indicate a blockage in the transmission fluid passages or a problem with the transmission pump.

Step 4: Transmission Solenoid Repair

If you have determined that the transmission solenoid is the problem, then it will need to be replaced. Replacing a transmission solenoid is a complex task that requires specialized knowledge and tools. It is recommended to get this done by a professional.

Step 5: Remove the Old Solenoid

First, the transmission oil pan will need to be removed. The solenoid will be located on the valve body inside the transmission. Carefully remove the old solenoid by disconnecting the wiring and removing any bolts holding it in place.

Step 6: Install the New Solenoid

Carefully install the new solenoid by connecting the wiring and bolting it in place. Make sure all connections are secure, and there are no loose wires.

Step 7: Replace the Transmission Oil Pan

After replacing the solenoid, replace the transmission oil pan and fill the transmission with the correct type and amount of transmission fluid.

Step 8: Test Drive

After replacing the solenoid, it is important to take the vehicle for a test drive to make sure the problem is resolved. Pay attention to the shifting of the gears and any unusual noises. If the problem persists, it may indicate a more serious issue, and the vehicle should be inspected by a professional.

In conclusion, troubleshooting and repairing a transmission solenoid requires careful inspection of various components and specialized knowledge. It is recommended to get the help of a professional if you are not comfortable doing it yourself. Regular maintenance and timely repairs can help prevent transmission solenoid and other transmission-related problems.

Transmission Solenoid Fuse Repair Cost

So, we learned about the transmission solenoid fuse, now let’s take a look at the repair cost. How much can you expect to pay to sort this problem out?

Well, in the best-case scenario, you can end up paying a single dollar for the fuse. In the worst case, you can pay between $60 and $100 for a single solenoid.

Also, the labor is quite extensive and will require about $200 to $400.

Transmission Control Module (TCM) – Signs of a Bad Module Facts:

  1. The TCM is a component in vehicles with an automatic transmission that selects the ideal gear at any given time.
  2. A bad TCM can compromise a vehicle’s fuel economy and overall driving performance, leading to issues with shifting and potential accidents.
  3. Signs of a bad TCM include unpredictable shifting, trouble shifting into higher gears, struggling with downshifting, getting stuck in the same gear, poor fuel economy, and the check engine light coming on.
  4. Unpredictable shifting caused by a bad TCM can result in incorrect or unintended shifting, leading to potential accidents.
  5. Issues with shifting into higher gears can cause the engine’s RPM to increase rather than dropping, preventing the vehicle from reaching its intended speeds.
  6. Struggling with downshifting caused by a bad TCM can result in the transmission being in high gear when coming to a stop, preventing the vehicle from moving at all.
  7. Getting stuck in the same gear, such as being stuck in neutral or first gear, can limit the vehicle’s speed and movement.
  8. A bad TCM can also lead to poor fuel economy, as the transmission won’t be selecting optimal gear selection and timing.
  9. If the check engine light appears while experiencing shifting issues, it’s most likely from the TCM or another part of the transmission system.
  10. A professional can use a scan tool to check for Diagnostic Trouble Codes and determine the reason for the check engine light’s appearance, and then schedule a TCM repair or replacement with a reputable mechanic.

Transmission Solenoid Fuse: In Conclusion…

In this article, we have covered quite a bit when it comes to the transmission solenoid fuse. First, we learned how automatic transmissions work and what are shift solenoids. Then we covered the shift solenoid fuse and learned its purpose.

After that, we learned more about the symptoms of a bad fuse or a bad solenoid. We also covered the troubleshooting process and learned what you can do in these situations to troubleshoot the problem.

Transmission Solenoid Fuse: Frequently Asked Questions (FAQs)

Now let’s answer some frequently asked questions.

What Is A Shift Solenoid

A shift solenoid is an electronic device that is installed inside of the transmission. The shift solenoid generally controls the flow of fluid inside of the valve body. When it activates, it allows fluid to pass and allows the transmission to go a gear up or down.

What Does A Solenoid Do In A Transmission

The transmission shift solenoid allows the transmission to shift. This solenoid gets an electric signal from the TCM and activates when necessary. Allowing the ATF fluid to pass and allow the transmission to go a gear up or down.

Will A Bad Shift Solenoid Throw a Code

Yes, in most cases it will throw a check engine code. The most common code is P0750. Even though if another solenoid is bad it could throw a different code. But somewhere in this number range.

Will A Bad Transmission Throw A Code

Yes, a bad transmission can throw a code. Usually, the codes for the transmission start at P0700. So, if you have a code that is starting with a 7, then you know that the transmission has gone bad.

How To Test Transmission Control Module

It is hard to test these computers if you don’t have the right equipment. So, it is best to find a replacement module and swap it out. This way you will be sure that the module of your car is defective or not.

Can A Bad PCM Cause Transmission Problems

Yes, it definitely can cause problems with the transmission. It can cause the transmission to hard shift, jump gears, or even not shift at all. It can also throw a check engine light and some strange codes and everything to work fine in the background. So, if you suspect the PCM, then you should definitely test it out.

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