Input and Output Speed Sensor Replacement
After an OBD II
scan you learn that your input or output speed sensor has malfunctioned
and needs to be replaced. You can take your car to the repair
shop or dealership and spend between $100 and $250 or more to have one
speed sensor replaced or you can replace the sensor yourself for a
fraction of the cost.
The DIY cost for replacing a speed
senor is the cost of the 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 average cost of a speed
sensor sensor is between $25 and $45.
instructions to replace a faulty transmission speed sensor:
The same removal and installation instructions apply for both the input
and output speed sensor.
CAUTION: When installing the new speed sensor
be sure the O-ring on the new sensor is correctly fitted on the sensor
NOTE: Although a input and output speed
sensor look very similar - they are not
Sensor Replacement Procedures Begin Here
of faulty sensor
Loosen and remove the negative
Locate the faulty speed sensor and
disconnect the speed sensor electrical connector.
Note: On older vehicles and vehicles driven
in harsh weather, be especially careful when disconnecting the plastic
electrical connector from the sensor as they break/crack quite easily.
Unscrew and remove the sensor.
Check the electrical connector wiring
to insure there are no breaks or exposed
wires. It is best to replace a cracked or broken connector
but it is usually not necessary as long as the connector fits tightly
onto the sensor. Use electrical tape to repair any
of new sensor
O-ring is installed on new sensor.
tighten new sensor. CAUTION: These sensors are plastic and
can break if over-tightened.
speed sensor electrical connector.
tighten negative battery cable.
the speed sensor, the Diagnostic Trouble Code that caused the check
engine light to illuminate should clear itself, which will turn the
check engine light off. If the check engine light does not
turn off, have the computer scanned again to see if there is a
different code set.