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My speedometer reads 30km. slower than its actually going. I just had the engine shampooed. Could that have caused the malfunction?

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: 99 chev express speedometer reads

check your vehicle speed sensor located at the rear of the transmission it may be faulty. What model is it and what transmission/engine do you have?

Posted on Aug 31, 2008

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SOURCE: speedometer working some now on

check the Transmission Fluid I do Believe that the Sensor For the Speedo is in the Transmission

Posted on Jan 04, 2009

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SOURCE: Speedometer dead!

Speed sensor is bad,It is located on the rear axle.
Once replaced,Make sure to reset the computer.

Please rate this a fixya

Posted on Feb 11, 2009

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SOURCE: The odometer and speedometer read twice the


Posted on Feb 12, 2010

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SOURCE: speedometer problems

Have the road wheels or tyres been changed from the original manufacturer's specification? If they have been changed for larger (or smaller) diameter wheels this would necessarily alter the vehicle's speedo veracity! This seems the most likely cause of errors in speedo readings. If this is NOT the case, then it sounds like a speedo fault. Best of luck!

Posted on Jun 11, 2012

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My dodge journey rpm goes up to 3000 not more and speed 30km/h

You do not say what year the vehicle is nor what size engine or transmission type you have. So this answer is a best guess scenario. I have had this experience in reverse with my Dodge Dakota where my speedometer would not register until I got to 30km/h. In my vase it was due to the ABS speed sensor located in the rear differential. It provided the low speed input to the ECM and the transmission VSS provided the higher speed input. I would not suspect the speedometer unit first since you have some operation of it. I would look to the transmission VSS as a most likely suspect.

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The speedometer can fluctuate rapidly under normal driving conditions when the car's speed changes abruptly, but sometimes the needle can start swinging around the dial without any fluctuation in speed. If the hairspring comes loose or breaks, it can't hold the speed cup in place, and the result is a fluctuation in the dial. In electrical speedometers, if the circuit that counts the magnetic pulses fails, it can cause the speedometer read-out to vary from the actual speed and to shoot upward or downward without notice. If a speed sensor in the automatic transmission starts to malfunction, it can affect the speedometer and cause fluctuations. In these instances, either the speedometer or the sensor needs replacement.

Sep 26, 2013 | Cars & Trucks

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Speedometer problems

Have the road wheels or tyres been changed from the original manufacturer's specification? If they have been changed for larger (or smaller) diameter wheels this would necessarily alter the vehicle's speedo veracity! This seems the most likely cause of errors in speedo readings. If this is NOT the case, then it sounds like a speedo fault. Best of luck!

Jun 11, 2012 | 1985 Ford Mustang

1 Answer

Well i'm going 60 mph but my speedometer read 70 plus for avery mile that i travel the meter read 1 1/3 so my car is gona hit 1k if i still friving like that?

In most cars especially those older models, the speed sensor for the speedometer is located in the transmission. Check for physical wear on the cable that leads from the transmission to the back of the dashboard. If you have increased the size of the tires dramatically, the actual car speed would be slower then the speedometer. Either the components responsible for measuring speed (speed cable, dashboard, speedsensor) is damaged or tire size or transmission parts or the transmission itself was replaced.

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Can you replace standard headlights with halogen (bright white) headlights on a 1999 328ci? can you replace 16" wheels with 17" wheels on a 1999 328ci and does that affwct the...

Halogen lights will draw more voltage than the standard lights and will more than likely cause electrical problems by wires and switches and such getting overheated.
Larger tires will make your speedometer read that you are going slower than you are actually going.

Dec 26, 2010 | 1999 BMW 328 Series

1 Answer

1992 SC300 Speedometer doesn't read accurately. Can it be calibrated?

No however the speed sensor can be replaced.

A couple of things can throw off the speedo, Tire diamete size, did you go a size up? this will make the speed show slower that you are actually moving. If you did, then it's working correctly. you will just have to make a mental note of the change or go back to the original size.

May 04, 2010 | 1993 Lexus Ls 400

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1996 dodge ram 1500 5.9 2wheel drive automatic code reading multiple cylender misfire, also speed odometer reading 10 to 15mph slower than actual speed ie 55 is actually 80

I need to verify something about your vehicle. Are youan the original owner and did your speedometer suddenly start reading slower, and was reading normally before? Or did you just find out recently because you got a ticket or somebody clocked your speedometer by riding along side you? If you are not the original owner, I would check the tire height rating from the manufacturer versus the rating of the tire you have on the vehicle now. If the manufacturer installed a "G" series and you have a "H" series, for example, your speedometer will read slower than your actual speed as the "H" series is a taller tire. The higher the letter in the series, the taller the tire will be. (larger in diameter)
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Yaris speedometer error

drive 10% slower and you aont get pulled for speeding

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