A bad Gearbox Valve body can be an extremely expensive repair, and finding out what's causing it is an essential part of a car's maintenance. Learn how to find a transmission valve body diagnostic trouble code and how much a replacement will cost. In this article, we'll discuss the repair options available for a bad transmission valve body. Ultimately, we'll also cover the cost of a new transmission valve body.
Diagnostic trouble codes for a bad transmission valve body
A bad transmission valve body can lead to numerous problems, including a check engine light, a malfunction indicator lamp, and higher engine RPMs. If you suspect a transmission problem, your next step is to diagnose the malfunction by reading the diagnostic trouble codes. Some of the most common transmission-related DTC codes are P0715, P0783, and P0751. Regardless of the reason behind the code, you should contact your car mechanic to determine the cause and proper fix.
Transmission valve body issues typically start out as a minor problem. They may not be noticeable until the car has been driven for more than half an hour, but if you don't take action, the problem will only get worse and will require a replacement. You can avoid the need to replace the entire valve body by checking your diagnostic trouble codes. This simple check may save you a ton of time.
The most common cause of this error is a malfunction in the transmission's control module. A failed valve body or solenoid can cause the transmission to malfunction. When a transmission solenoid malfunctions, a P0730 DTC is generated. A P0715 DTC indicates a problem with the input/turbine speed sensor. The input speed sensor is unable to correctly read engine RPM, so the transmission will not shift. A P0717 DTC means the transmission's input speed sensor is not supplying a signal to the PCM, and the vehicle will not shift.
Repair options
If your gearbox valve is seized and leaking oil, there are two main repair options: replacing it or rebuilding it. Both options are costly, but a rebuild is more cost-effective and will preserve the valve's components. While a valve body replacement may be the most expensive option, it may be the best option if it's not damaged beyond repair. In that case, you can use a used valve replacement from a dealer. Used parts still hold their value and cost less than brand-new ones.
One important thing to note is that you should never attempt to fix a gearbox valve on your own. The valve body is located inside the gearbox, covered with a protective cover. This makes it difficult to access the valve body. Therefore, a professional must be hired for the repair. Luckily, it's possible to do a DIY repair if the problem is minor. The first step in repairing a valve body is to determine which part of the gearbox is faulty.
A faulty valve body could lead to unexpected gear changes. You might notice a delay in gear changes or a skipping sensation when changing gear. It could also result in gear damage. A malfunctioning valve body may cause the car to experience harsher gear shifting and a delayed gear change. The problem may require a specialist to determine the precise location of the faulty valve. And don't forget to check the RPM before you schedule a repair!
Cost of a new transmission valve body
The cost of a new transmission valve body can run to several hundred dollars. However, the repair of a worn-out valve body is generally much cheaper than replacing it. If the valve body is damaged beyond repair, it may be too damaged to repair. Consequently, the only option is to replace it. These parts are cheaper but still retain their value.
While valve bodies were historically rebuilt, most professional repair shops now replace them. In fact, valve body replacement can cost between $100 and $2,500, depending on the parts and vehicle specifications. On top of these costs, you may also be required to pay hundreds of dollars for labor. Depending on your area, this repair may cost even more. Therefore, it is important to compare costs before making a final decision. If you are considering replacing the transmission valve body on your own, be sure to keep these prices in mind.
If you have a valve body failure, you may have noticed a 2 second delay or a harsh shift. This is known as garage shifts. To avoid experiencing garage shifts, limit the number of times you shift gears. To find out the exact cost of a transmission valve body replacement, take your vehicle to a qualified workshop. Once you've found the cause of the problem, you'll know what to do next.
