SOURCE: ABS always on...changed speed sensor
Please remove your tires and all the brake pads for thorough cleaning. It's only dirt that is triggering sensor. This should fix it.
rate this please
SOURCE: 99 f250 SD 7.3
Your speed sensor in your trans. needs to be checked out sounds like its not working or not getting a good signal until its generating enough power and speed to start until it reaches 30 MPH. Check that out sometimes it could just be some dirt on it. It all makes sense the ABS light is on because its not reading the speed of the tires, and the AOD light is on because It has no idea when to shift into overdrive without knowing how fast its going. I sure Hope that Helps You Out, And Thanks, Bear001
SOURCE: after changing front left flat, abs warning and
This Sounds Like The Wheel SPEED SENSOR PLUG @ That Wheel Has Been Dissconnected or Disturbed Try Looking @ Rear of That Wheel See if Flat Tire Dammaged The Plug/or Wire.
SOURCE: Speedometer won't work.ford dealer says no sensor
If it doesn"t have a speedo cable it has to have a speed sensor. It is usually located on the drivers side of the transmission bolted into the tail housing. Sometimes they have a cable going to the sensor but was changed to just the sensor. Have you called a parts house like auto zone, and asked if they have a listing for a vehicle speed sensor for your vehicle> You do not have to go to the dealer all the time.By the way most speed sensors are on the outside of the trans not on the inside.Usually a 11mm wrench will remove the bolt that holds the sensor in place. Remove the bolt pull the sensor out and replace with new.
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