What is the transmission oil sensor/switch? What are the symptoms of a transmission oil pressure sensor malfunction?
What is Transmission oil pressure sensor/switch?
Transmissions, just like all other parts of your car require oil (ATF), to work properly. If the oil level in your transmission is too low or the oil isn’t flowing through the transmission properly, it may stop working properly. The transmission oil pressure sensor monitors the oil level in the transmission and reports it to either the powertrain control module or transmission control module. This information is used by the PCM/TCM to adjust gears for smooth shifts.
Vehicles that are newer than five years old have multiple transmission oil pressure sensors. Depending on your vehicle’s make and model, the number, location, and type of these sensors can vary. Transmission oil pressure switches are also available for older vehicles. This switch is used to illuminate an indicator lamp on the cluster of the instrument cluster, and not to send data to the computer.
Malfunctioning Transmission Oil Pressure Sensor Symptoms
Because it is located under the vehicle and near the ground, the transmission oil pressure sensor can wear down or fail. This, in turn can send the wrong information to your vehicle’s PCM. It can lead to incorrect gear shifts or damage to transmission parts.
Drivers may be able to notice signs that a faulty pressure sensor in the transmission oil pump is defective. These symptoms could include:
In Safe Mode
The transmission oil pressure sensor’s primary function is to send information to the PCM to regulate gear control. The transmission can go limp if the oil pressure sensor is damaged or does not send the correct information to it. The transmission will lock into the gear programmed by the manufacturer to prevent damage.
Difficulty with Gear Changes
A damaged oil pressure sensor can cause difficulty shifting, which is the most frequent sign. This can be caused either by a loose connection to the PCM or damage to the cable. The sensor may generate low voltage if there is not enough signal transmission. Low voltage is low oil pressure. The PCM can misinterpret this information and cause problems, particularly when downshifting.
High Engine Speed
This problem will continue. As the vehicle accelerates, the engine speed will increase and the transmission will want the shift to a high gear. The engine speed will rise if the transmission is having trouble shifting gears.
The smooth, efficient operation of your vehicle is dependent on the accuracy and reliability of your transmission oil pressure sensor. You should contact a professional mechanic if you see any of the symptoms or warning signs.
