Dt12 Transmission Speed Sensor Location (2024)

FAQs

Dt12 Transmission Speed Sensor Location? ›

The countershaft

Your car has a input and output speed sensor. Both are located inside the transmission and attached to the mechatronic module.To access the sensors, the transmission oil sump needs to be removed. This will give access to remove the mechatronic unit itself as the sensors are located on top of the module.

A bad speed sensor can cause transmission issues and erratic speedometer ratings. A malfunctioning sensor will render the transmission torque converter unable to apply the clutch and form a mechanical link between the engine and transmission. This may also cause your vehicle's cruise control to be disabled.

Common symptoms of a faulty transmission speed sensor include jerky gear changes, malfunctioning cruise control, and an illuminated check engine light. The transmission control module (TCM) knows how fast each shaft should be spinning in each gear.

This sensor or switch is typically mounted on the side of the transmission and screws into the body of the transmission to detect in which gear the transmission is engaged.

A car speed sensor also referred to as a transmission speed sensor tracks how fast a vehicle's crankshaft is spinning. The sensor shares this information with your car's computer. And, it can show your fast car's engine is spinning at any moment.

It is not safe to drive a vehicle with a bad speed sensor because ECU will not be able to identify the driving speed. Also, the ABS will not start its operations and you might lose control of your vehicle.

When you unplug the Vehicle speed sensor, you will only get 1600 RPM's out of the engine. If it is programmed to the engine top limit of 2100. The truck will operate normally.

Turn off your vehicle's ignition and wait patiently for 5 to 10 seconds. Start the engine and allow it to idle for several seconds. Switch off the ignition and wait patiently for another 30 to 40 seconds. Repeat these steps 2 to 3 times in order to reset your vehicle's transmission control module.

For most vehicles, the speed sensor is plugged into the transmission (or transaxle). When the speed sensor fails the speedometer stops working and shifts may become erratic. Replacing a speed sensor is easy. Nothing is more frustrating than getting into your car and the gear shifter lever being locked in Park.

Can a speed sensor stop transmission shifting? ›

When there's no speed signal coming from the sensors, shifting of gears will be a problem because the powertrain control module won't control them correctly. This will make the transmission not work properly. It will either shift more quickly or roughly than expected.

Typically, two sensors communicate the transmission data to the vehicle's powertrain control module. The first sensor, referred to as the input sensor, monitors the speed of the transmission's input shaft. The second sensor is the output sensor, which monitors the output shaft speed.

Testing a Transmission Speed Sensor

If you can get to the sensor terminals, you don't have to remove the sensor to test it. You can unplug the sensor and measure the resistance if it's a variable reluctance sensor with a copper winding and a magnet. You can measure the output of the sensor as AC voltage.

A failing transmission position sensor may no longer send the right signals to the Powertrain Control Module, or PCM. Without signals from the position sensor, the PCM will no longer know when to shift the transmission's gears out of park into a moving gear. Transmission shifts into the wrong gear.

The speed sensor detects a gear or target wheel in the transmission and generates an electric digital signal proportional to the speed of rotation. The transmission controls use this information to modify various transmission functions such as shift points and perform diagnostic tests.

The Transmission Range Sensor tells the PCM the position of the transmission shifter. The PCM uses this information to control which gears of the transmission to enable or disable. When the TR sensor fails it can cause wrong gear starts, no upshifts, or what feels like a falling-out-of-gear condition.

The average cost to replace a transmission speed sensor is about $260—that accounts for $105 for parts and $154 for the mechanic's labor costs. The exact repair cost for you will depend on your vehicle, the cost of the part, and how much your shop of choice charges for labor.

Its proper functioning depends on the data from the transmission speed sensors. If it fails to work, then it means the sensors have malfunctioned. The PCM will transmit an error code to ECU, which will shut down. If that happens, it would be better to contact your mechanic immediately to have your vehicle checked.