What to know about the Transmission Oil Pressure Switch:
Transmission fluid serves the same purpose as engine oil – it lubricates moving parts and protects against friction damage. This fluid also has another work to do. As you accelerate, the transmission fluid pump builds hydraulic pressure within the transmission. A transmission pressure oil button reads the amount of pressure and then signals the computer. The computer takes that information and knows if the clutch should be engaged to shift. Your transmission will have several different transmission fluid pressure buttons, but the exact number will depend on the year, make and model, as well as the type of transmission mounted.
Pressure switches are subject to a vast amount of wear and tear over time, mainly if you spend a lot of time in city driving conditions where you don’t maintain a steady speed for long periods. You may experience problems such as harsh shifts, a Check Engine light, or your transmission may be stuck in limp mode where you can’t accelerate out of second gear.
Facts to Note:
Transmission oil pressure switches or buttons are not serviceable and must be changed when they fail.
Depending on the severity of the damage, you may need to change the transmission control module as well.
These switches are not examined during any upkeep service though regular transmission fluid changes can stop failure.
How to Fix:
The transmission oil pressure switch is confirmed to see if it needs to be changed
The faulty transmission oil pressure switch is detached
The new transmission oil pressure switch is installed
The transmission oil pressure switch is tested for operation
The transmission is tested to ensure proper operation of the transmission oil pressure switch
Most vehicles will never have a transmission pressure switch changed in their lifetime. Regular transmission fluid changes can help avoid pressure switch failure most of the time. If you experience signs you believe may be a transmission oil pressure switch problem, have one of your expert mechanics diagnose it.
Common symptoms indicating you may need to change the Transmission Oil Pressure Switch:
Check Engine light is on
The transmission shifts are harsh
The transmission won’t shift up to higher gears
The transmission is in limp mode
Importance of this service:
With faulty transmission fluid pressure switches, your transmission will not shift properly. The Check Engine light will light up, and you may not be able to shift into higher gears.