Automatic Transmission Oil Pressure Switch Buyer’s Guide
- Your car employs various sensors and switches to help gather data. One switch that is crucial to the automatic transmission system is the automatic transmission oil pressure switch.
- The automatic transmission oil pressure switch monitors the pressure inside the transmission case and sends the data to the engine control module.
- The automatic transmission oil pressure switch can be found either on the side of the valve body inside the transmission or connected to the side of the transmission case itself.
- It’s recommended to change the oil every 50,000 kilometers in order to prolong the life of your oil pressure switch.
- A faulty transmission oil pressure switch can make the vehicle go to limp mode and make the shifting of gears difficult.
- Depending on your car’s year, make, and model and other factors, you might be able to purchase an aftermarket automatic transmission oil pressure switch for less than $100.
Your vehicle can operate without a hitch because of its sensors and switches. These tracking devices relay important information to the engine control module or ECM, which allows it to control many essential functions of the car. Given the importance of the sensors and switches in your vehicle, it is crucial to replace them when they go bad. Otherwise, the ECM won’t receive accurate information, and this can result in bigger problems for you.
Your car’s automatic transmission also employs sensors and switches in order to function properly. However, since the transmission assembly is a group of constantly moving parts, the heat and friction that comes with this kind of environment can cause these tracking devices to fail. One particular switch that can succumb to this kind of wear and tear is the automatic transmission oil pressure switch.
What does the oil pressure switch do?
The automatic transmission oil pressure switch keeps track of the pressure inside the transmission case whenever the automatic transmission fluid or transmission oil passes through to lubricate various moving parts. By providing this information to the engine control module, your vehicle’s automatic transmission is optimized, enabling a smoother shifting of gears.
With a functioning automatic transmission oil pressure switch, other transmission components are also protected against damage when the transmission fluid is low. If there’s low fluid level, the ECM receives this information from the oil pressure switch and then activates the vehicle’s limp mode. Limp mode is when your car is forced to use only the second or third gear to prevent further damage to your transmission parts and to keep you safe while driving.
Where is the transmission oil pressure switch?
The location of the automatic transmission oil pressure switch may vary depending on your vehicle. It can be found attached to the side of the valve body inside the transmission or connected to the side of the transmission case itself. If you are going to swap out your old automatic transmission oil pressure switch on your own, you can easily locate this part by raising your vehicle using a floor jack and then sliding under it.
When should an automatic transmission oil pressure switch be replaced?
Just like your other transmission components, the automatic transmission oil pressure switch is constantly exposed to high heat and other harsh elements that can speed up its deterioration. On top of that, other factors like your driving habits, oil change frequency, and the overall condition of the transmission itself can contribute to the failure of the automatic transmission oil pressure switch. To be able to prolong its lifespan, here are some things that you can do:
- Change transmission oil every 50,000 kilometers
- Replace the transmission filter and transmission fluid at the same time
- Drive safely and smoothly to keep the automatic transmission from overheating
Symptoms of a bad automatic transmission oil pressure switch
With a faulty automatic transmission oil pressure switch, your vehicle’s ECM won’t be able to gauge the pressure in the transmission when the fluid passes through. This is bad news because it can lead to bigger transmission problems. To avoid this kind of hassle, experts suggest keeping an eye on the following symptoms of bad oil pressure switch:
Difficulty in changing gears
Knowing the correct levels of pressure can help optimize the transmission and allow the vehicle to change gears efficiently. But if you have a failing automatic transmission oil pressure switch installed, your car may find it difficult to shift to lower or higher gears.
Vehicle is on limp mode
Once the automatic transmission oil pressure switch fails, your vehicle might enter the limp mode. Limp mode is a self-preservation feature that limits your car to second or third gear. This is done to prevent your other transmission components from incurring damage when the transmission fluid is low.
Check engine light
Your vehicle’s computer can warn you that the automatic transmission oil pressure switch is problematic by triggering the check engine light. Pay attention to this warning sign and try to scan your car for fault codes as soon as you can. Look out specifically for these fault codes: P0844, P0845 or P0847.
What to look for in your replacement automatic transmission oil pressure switch?
The most important thing to consider when buying a replacement automatic transmission oil pressure switch is its durability. Since this device is located in the vehicle’s transmission where there are a lot of moving parts, it is regularly subjected to extreme heat and friction. That said, a substandard aftermarket automatic transmission oil pressure switch won’t be able to last long. To ensure that you will get a quality component, purchase it from a reputable aftermarket brand. Most aftermarket brands today produce auto parts and accessories that are OEM-like when it comes to quality.
Aside from durability, you also have to make sure that your aftermarket automatic transmission oil pressure switch can directly replace your stock component. This is to avoid any hassle during the installation process.
How much does an automatic transmission oil pressure switch replacement cost?
You can purchase an aftermarket automatic transmission oil pressure switch from online auto parts stores for less than $100. The exact price, however, may vary depending on several factors such as your vehicle’s year, make, and model, the part’s brand, warranty, and more. When it comes to availability, the automatic transmission oil pressure switch is not hard to find; shops often have it in stock.
Finding the right parts and accessories for your ride
To avoid mistakes when searching for the right replacement part or accessory for your vehicle, you might want to ready your car’s specifications. By using your car’s information, you can ensure that only aftermarket components compatible with your vehicle will be offered to you. With online auto parts retailers specifically, you can use additional filtering options when shopping to come up with customized options. You can look up car parts or accessories by price range, brand, material, colors or finish, quantity sold, location, and more.
How to Replace an Automatic Transmission Oil Pressure Switch
Your engine oil is responsible for lubricating the vital parts of your vehicle, preventing the chances of premature wear. The absence of this important oil can cause serious damage in some parts of the engine, knowing that it also assist in maintaining an ideal engine temperature. In order for you to easily monitor your oil level, a high-quality automatic transmission oil pressure switch is needed to keep track of the oil system. This gives you a warning signal if the switch detects a low oil pressure. But if you have a damaged automatic transmission oil pressure switch, you cannot experience an excellent driving performance. Make sure to replace your faulty switch immediately.
Things you'll need:
- Flathead screwdriver (small)
- Rag or cloth
- New oil pressure switch
- Automotive thread sealant
Step 1: When parking your vehicle, choose a safe and well-ventilated area.
Step 2: Prepare the tools and materials for this DIY replacement job.
Step 3: Turn off your engine, and make sure to let it cool down completely before proceeding to the next steps.
Step 4: Open your hood.
Step 5: You need to locate the automatic transmission oil pressure switch. The location of the switch will differ from model to model. You may refer to your manual if you find it hard to locate the switch.
Step 6: Clean the area around the switch using a clean rag or cloth, and remove all the oil and dirt from the area.
Step 7: Carefully disconnect the electrical connector or wiring harness from the switch. You may use your small flathead screwdriver to pry the locking portion of the switch and the wiring harness. Gently pull it until it detaches from the switch completely.
Step 8: Now, you need to remove the old automatic transmission oil pressure switch. Do this by rotating the switch counterclockwise. Use a wrench to unscrew the switch until it is released.
Step 9: Prepare the replacement switch. Apply an automotive thread sealant to your switch before installing it in the engine block.
Step 10: Make sure to secure and tighten the new automatic transmission oil pressure switch, following your vehicle manufacturer's specifications. Be careful not to overtighten the switch.
Step 11: Carefully plug the wiring harness into the replacement switch. Make certain that the electrical connector is properly placed in its correct location.
Replacing your faulty automatic transmission oil pressure switch doesn't require expert DIY skills. Even a DIY beginner can do this task in less than an hour. When choosing a replacement automatic transmission oil pressure switch, choose a switch that is compatible with your vehicle's engine management system and the lubrication system. We also recommend you to choose an automatic transmission oil pressure switch with a good warranty coverage to assure you that you can get a free replacement when the switch became faulty within the covered warranty period.
- Take note of your stock component's specifications (terminal type, thread size, and connector) when choosing an automatic transmission oil pressure switch that fits perfectly to your engine. Take time comparing these specifications with the replacement switch to avoid hassle in the future.