Speedometer going crazy??
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Junior User
Joined: Sep 2007
Posts: 51
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From: Birdsboro, PA
Speedometer going crazy??
i have a 06 f-250 with the 5.4... the other day the speedometer stuck at 40 mph when i came to a stop at a traffic light. when i would accelerate the speedometer when up like usual but it was reading like 95 mph when i was crusing down the road. the next day it was back to normal. now today when driving to work the speedometer started to act up again... after coming to a stop yet again it fixed itself... any one else have this problem before??
Posting Guru
Joined: Jul 2007
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From: Spring Lake
Well i've seen in several cases of vehicles that when they are jump started their guages go ape ****. Drive it for a couple days and then it's fine.
But if I recall your vehicle speed sensor is on the rear axle. It sends a voltage readout to the computer and speedometer. I do not know what ford is but usually its a super low voltage that increases or decrease with speed. If one of the wires going form the VSS to the comp, or to speedo has a slight nic in it, it can get a small voltage from an outside source (such as another wire with a small nic in the insulation) and give a false readout. Granted there can be a bunch of other small simple things that are occuring this is one of the more common culprits as it is a truck, and not typically babied like a car.
But if I recall your vehicle speed sensor is on the rear axle. It sends a voltage readout to the computer and speedometer. I do not know what ford is but usually its a super low voltage that increases or decrease with speed. If one of the wires going form the VSS to the comp, or to speedo has a slight nic in it, it can get a small voltage from an outside source (such as another wire with a small nic in the insulation) and give a false readout. Granted there can be a bunch of other small simple things that are occuring this is one of the more common culprits as it is a truck, and not typically babied like a car.
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Junior User
Joined: Sep 2007
Posts: 51
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From: Birdsboro, PA
ok thanks very much for the info i will drive it and see if it keeps doing it then i will go from there.... the truck is babies a bit more than my car since it doesnt go to the track and run every other weekend.. but its always a possibility that a wire is nicked
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Joined: Jul 2002
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From: Long Island USA
There was a bad batch of instrument clusters from the factory. Go to a dealer and ask about it, if it's under warranty. Ford might replace it even if it's not.
The key symptom is when not moving, it reads a high number, and consistently reads a higher number the faster you go. And is intermittent
The key symptom is when not moving, it reads a high number, and consistently reads a higher number the faster you go. And is intermittent
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Junior User
Joined: Sep 2007
Posts: 51
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From: Birdsboro, PA
thanks for the info.. yea its still under warranty since it only has 18,xxx on it... a good friend of mine works in the service writing at a ford dealer so ill just see about getting the cluster replaced...
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New User
Joined: Sep 2007
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I had the same thing happen to my 05 they had to replace the instrument cluster. It took a couple of times back to the dealer to prove it (they thought I was crazy) The only bad thing was engine hours total was reset. I bought the truck used and forgot what the total was before.
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Elder User
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Originally Posted by krewat
There was a bad batch of instrument clusters from the factory. Go to a dealer and ask about it, if it's under warranty. Ford might replace it even if it's not.
The key symptom is when not moving, it reads a high number, and consistently reads a higher number the faster you go. And is intermittent
The key symptom is when not moving, it reads a high number, and consistently reads a higher number the faster you go. And is intermittent
This has been going around. A Tahoe in the family just had to have its cluster replaced too do to that exact issue. A recall was not formaly sent but we were notified of the issue.
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Joined: Nov 2005
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The day of this post, I had the same problem. My speedometer was stuck at 30 MPH when parked.
I am still debating about the course of action -- Waite for a TSB, or nag the dealership and waiste many hours of my life. The mechanic tells me that it is because of the cold, but if that is the case, I don't think they would be using them on Ice Road Truckers.
I am still debating about the course of action -- Waite for a TSB, or nag the dealership and waiste many hours of my life. The mechanic tells me that it is because of the cold, but if that is the case, I don't think they would be using them on Ice Road Truckers.
Senior User
Joined: Sep 2007
Posts: 185
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From: SE Wash
There is a TSB on our speedometers. There was an earlier thread with several of us having the same problems. When mine kept telling me I was doing 50 mph in the driveway, the dealer ordered a new cluster and replaced it under warrenty. No issues since.
'06 F250 SD
'06 F250 SD
Elder User
Joined: Jun 2007
Posts: 528
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From: Lake of the Ozarks, MO
Mine did it for about 3 days and hasnt done it since. I went in and talked to the dealer about it, and they made a note of it, so if anything like that happens again they know it isn't the first time...
