Speedometer not reading correctly.

My speedometer will go up to 35mph, but it acts like it gets stuck and won't go any higher. The odometer is still working properly. Could this be the vehicle speed sensor even without a check engine light?

My car has 125000 miles.
My car has an automatic transmission.

Experienced mechanics share their insights in answering this question :
Hello, thank you for writing in. The speedometer reads information coming in from the BCM (body control module). Which gathers its information from the wheel speed sensors, and engine speed sensors. With the meter partially working, it is likely an issue with the sensors, the gauge itself, or the module. The best way to tell is to do some electrical testing on the instrument cluster first. This will tell you if you are receiving the electrical inputs that you are supposed to be getting at every speed. If you are, and the gauge is not working, you are likely going to need to replace the entire instrument cluster. Only further testing will tell. For more diagnostic help, contact our service department to schedule an appointment.

How to Identify and Fix Common car Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced mechanics :

Why is my Ford speedometer not working? A lot of things can contribute to a faulty speedometer. Worn out or damaged drive gears, wiring problems, bent axles, faulty speedometer head, and faulty speed sensor are a few of the common things that can cause an inaccurate reading on your Ford speedometer.
The most common reasons a Ford F-150 speedometer isn`t working are the vehicle speed sensor (VSS), a faulty speedometer, or an electrical issue.
The most common causes of a speedometer that stopped working include are a faulty speed sensor, a broken gear on the speedometer, damaged wiring, or a faulty engine control unit.
Find the Reset Button

All cars, regardless of the manufacturer, have reset buttons located on the glass of the dashboard. It`s located on the left edge of your dashboard. This is the same for Ford cars too. The reset button should be located on the dashboard, which is on the left side.

Your speedometer is directly linked to the speed sensor — meaning if anything goes wrong with the vehicle speed sensor, it`ll lead to a speedometer failure. Whether you have hall effect or digital speed sensors, here are some signs of a bad sensor that may accompany your erratic speedometer needle: Transmission issues.
In speedometer controllers of this type that use a detection signal from a vehicle speed sensor, the detection signal from the vehicle speed sensor is transmitted through a powertrain control module (hereinafter referred to as “PCM”).
Damaged wiring or a blown fuse could be enough to through the speedometer out of whack. A malfunctioning sensor or engine control unit could be reporting an erroneous speed. A change in wheel or tire size could even throw off the senor and its calculations.
While you are driving, if you notice the needle on the speedometer jumps erratically from one number to another, the speedometer cable is most likely damaged or the sensors on the driveshaft are not accurately sending the signal through the cable.
Up-sizing, or installing a taller tire, will lead to a speedometer reading that is slower than your actual speed. This is because a taller tire will have a larger overall circumference, causing it to need to travel more distance per revolution than the original equipment tire.
Up-sizing, or installing a taller tire, will lead to a speedometer reading that is slower than your actual speed. This is because a taller tire will have a larger overall circumference, causing it to need to travel more distance per revolution than the original equipment tire.
While you are driving, if you notice the needle on the speedometer jumps erratically from one number to another, the speedometer cable is most likely damaged or the sensors on the driveshaft are not accurately sending the signal through the cable.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Can I convert my analog speedometer in my 2013 Denali to a digital speedometer like the newer models?
ANSWER : Hi there. In regards to upgrading the instrument cluster, it’s quite possible to complete this with aftermarket kits. In some cases, an OEM install kit would be available from a dealership or GMC parts center, but the install on those typically requires additional software updates to the ECU. Unfortunately, we do not offer aftermarket or upgrade component installation services or technical assistance, so you might want to contact a GMC specialist that completes this service for estimates.

Instrument cluster on the dash, tachometer bounces, speedometer at 0. Unplugged ABS module, speedometer at 0. doesn’t shift gears
ANSWER : Hello. There are a lot of possible issues that can cause this. Most of the time this is either due to a short in the ABS module or it may just be a voltage issue. I would usually start by making sure that the battery and alternator are in good shape. If they are good, then I check the connections at the battery and the ground connections. Any of these will cause this issue if they are interrupting the voltage supply. If those are all fine, then it will need a new ABS module. I recommend having another expert provide an inspection for the car. A qualified professional from YourMechanic can inspect the relevant electrical systems in order to diagnose the problem and advise you on correct repairs.

Brakes work just fine; ABS light on, speedometer non-responsive; put fuse in, and this corrects the problem and then the fuse blow
ANSWER : Hello, thank you for writing in. When a fuse blows repetitively the circuit is picking up excessive power from somewhere in the system. These issues can be difficult to trace out, but are typically done with a multi-meter. Due to the number of components that can be attributed to this, the diagnostic process can be lengthy. A wiring diagram will be beneficial for this if attempting to do it at home. Due to the ABS warning light being on, you will want to scan the vehicle for codes. There may be a code saved that will help point you in a direction that will make diagnosis easier. For more help with this type of electrical testing, contact our service department.

How do I read the speedometer in a 2012 Chevrolet Equinox?
ANSWER : The speedometer is on the right side of your instrument control panel. It tells you how fast you are driving at. The speedometer is a semicircle with numbers on it; the numbers represent the speed in either mph or km/h. Whatever number the pointer on the speedometer is pointing to is the speed that you are currently driving at.

How do I read the speedometer?
ANSWER : The speedometer is located on the instrument panel, and tells you how fast you are driving. The speedometer is a semicircle with a bunch of numbers, which correspond to a speed, in MPH. Whatever number the needle is pointing at is the speed at which your vehicle is traveling.

How do I read the speedometer?
ANSWER : The speedometer is located on the instrument panel, and tells you roughly how fast your vehicle is going. The speedometer is a semicircle, with a hand that points to the speed at which you are currently driving.

interior reading lamp out
ANSWER : Hello. There is a fuse for all of the interior lights, not one for each individual light. It sounds like the bulb may have blown out and needs to be replaced. The way to replace the bulb is to pop off the plastic cover of the light with a small screwdriver and then replace the bulb. If you are worried that you might break it, I would suggest having a certified technician, like one from YourMechanic, assist you with this.

How do I read the speedometer?
ANSWER : The speedometer is placed on the right side of the instrument cluster, and tells you how fast you are driving at any given time. The speedometer has two semicircles, each with a set of numbers. The smaller, inside semicircle tells you your speed in terms of kilometers per hour (km/h). The larger, outside semicircle tells you your speed in terms of miles per hour (mph).