The output speed sensor measures how fast a vehicle moves and sends that information to other vehicle systems. The transmission control unit uses the speed to determine when to change gears, adjust the torque converter and display the vehicle’s speed in the speedometer.
What happens when a transmission speed sensor goes bad?
Therefore, a failing speed sensor will have a direct impact on automatic transmission operation. One of the most common signs of a bad speed sensor is abnormal automatic transmission operation. If the VSS is faulty, the transmission may exhibit symptoms such as delayed shifts, hard shifts, and limited gear operation.
How does transmission output speed sensor work?
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.
How do you test a transmission speed sensor?
Disconnect the sensor from the housing on the transmission, as indicated in the repair manual for your car. Disconnect the sensor’s wire coupling. Using the multimeter’s voltmeter connect the probes to the ground and reference wires in the connector. If no voltage is received, the sensor is faulty.
What is the difference between vehicle speed sensor and transmission speed sensor?
If you noticed, I’ve used the words, transmission speed sensor and vehicle speed sensor so far. The only difference between the two is what the manufacturer decides to call it. … In either case, the faster the transmission output shaft moves, the more voltage the sensor produces.
How can you tell if a transmission speed sensor is bad?
- Transmission revs higher before it changes gears.
- The car’s transmission engages into overdrive late and sometimes will never go into that top gear.
- Brakes are sometimes harder than normal when coasting.
- Speedometer behaves erratically or sometimes does not work at all.
Can I drive with a bad transmission speed sensor?
So, a bad speed sensor doesn’t actually stop your car from running, but the wrong signals it sends to the ABS or transmission can trigger certain smart components of your car to stop functioning properly. That said, driving a car with a bad wheel sensor is dangerous and not advisable.
Can a faulty ABS sensor cause transmission problems?
Both the traction control system and ABS are controlled by the ECU. … However, these sensors are liable to failure; they can become faulty over time and send wrong information to the ECU. Hence, your transmission system might be receiving incorrect signals from the ABS, leading to transmission problems.
Where is the speed sensor located on a 4L60E transmission?
The transmission connector is located on the passenger side of the 4L60E transmission housing and on the driver side of the 4L80E transmission housing. The vehicle speed sensor is located in the tail shaft housing on the passenger side.
How much does it cost to replace a transmission speed sensor?
To replace the speed sensor, you are going to pay, on average, between $330 and $380. The labor should only cost you between $80 and $100, while parts will run you about $265.
How do you check a transmission control module?
The transmission control module can often be found below the cover at the back of the transmission and should be located just near the engine control module’s position. The position of the transmission control module is found under the center console in the interior or under the hood near the car battery.
Can electrical issues cause transmission problems?
If it fails it can cause automatic transmission problems such as late harsh shifts, early soft shifts, or can result in no shifting at all. The mass airflow sensor is directly related to engine performance, so an issue may affect the drivability of the vehicle and a poor running engine.
Can you clean a speed sensor?
With the sensor free, take your rag and wipe the sensor until it’s clean. I prefer not to use any chemicals on the sensor to avoid potential problems. If, however, the sensor is really grungy, use a mild soapy solution and rinse well. The ABS sensors are precision instruments in a crude environment.
Can a bad TPS cause transmission problems?
Because the TP sensor is an input to the control module for various automatic transmission functions (e.g., shift points and torque converter clutch operation), a problem with the sensor can cause transmission performance issues. … TP sensor issues can cause harsh or delayed shifting.
How much is a transmission speed sensor?
Depending on the vehicle year, make and model, a speed sensor can cost as little as $7.92 or as much as $100. For most vehicles, the cost for a speed sensor is between $25 and $45. Follow these procedures for replacing a faulty vehicle speed sensor (VSS).