Speedometer creep

Asked by Jun 11, 2015 at 03:55 PM about the 2004 Lexus LX 470 Base

Question type: Maintenance & Repair

Speedometer works fine if I accelerate up to highway speed and maintain that speed
(as checked against my phone speed ap).  However, if I do much stop and go driving
the speedometer begins to "ratchet" so that it becomes 5, 7, 10, 15 mph above the
actual travel speed.  If I stop the speedometer will read the same (5, 7, 10, 15 mph).  
If I restart within say 30 seconds it will still be high, but if I wait a couple of minutes
and then start, I can watch the speedometer move to zero and the speedometer will
read fine initially and then we start the process all over again.  I believe that the
odometer is reading correctly.

1 Answer

70,255

Sounds like the stepper motor for the speedometer is sticking. Unfortunately you'll probably have to replace the whole instrument cluster to fix it. I'd have a shop plug into it with their scan tool to check the vehicle speed sensor. But if the odometer is reading correctly I doubt it's the speed sensor. HTH. -Jim

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