Automatic transmission oil pressure sensor
Purpose:
* Monitors transmission oil pressure in an automatic transmission (AT).
* Provides information to the transmission control module (TCM) to adjust oil pressure and prevent damage to the automatic transmission.
Working principle:
* The pressure sensor consists of a diaphragm and a resistor.
* When oil pressure increases, the diaphragm moves, changing the resistance of the resistor.
* The TCM detects changes in resistance and calculates oil pressure.
Location:
* As a rule, the transmission oil pressure sensor is located in the automatic transmission pan or on the transmission housing.
Symptoms of malfunction:
*Inaccurate oil pressure readings
* Problems with gear shifting
* Slipping or jerking when shifting gears
*Transmission oil leaks
Causes of malfunction:
* Mechanical faults (diaphragm or resistor damage)
* Electrical faults (opens or short circuits in the wiring harness)
* Transmission oil contamination
* Malfunctions of the valve body or automatic transmission solenoids
Consequences of the malfunction:
* Increased wear of automatic transmission
* Reduced gearbox life
* Damage to internal automatic transmission components
Diagnostics and replacement:
* Diagnosis of a faulty transmission oil pressure sensor is usually done using a diagnostic scanner.
*Replacement of the sensor is relatively easy and can be done yourself if you have the necessary tools and skills.
Regular Maintenance:
* It is recommended to regularly check the level and condition of the transmission oil.
* Changing the transmission oil and filter at intervals specified by the manufacturer helps extend the life of the automatic transmission and prevent transmission oil pressure sensor malfunctions.