2015 Ram ProMaster 1500 Speedometer Isn't Working

Common Causes of Speedometer Malfunctions in Your 2015 Ram ProMaster 1500 and How to Fix Them

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Reviewed by
Andrew Hajjar
Written by RepairPal Car Genius
Updated January 14, 2025
0%
35% chance it's the
Vehicle Speed Sensor (VSS)
0%
28% chance it's the
Speedometer
0%
23% chance it's the
Electrical Issue
0%
14% chance it's
Something else
The most common reasons a 2015 Ram ProMaster 1500 speedometer isn't working are the vehicle speed sensor (VSS), a faulty speedometer, or an electrical issue.
  • Vehicle Speed Sensor (VSS): A faulty vehicle speed sensor can result in inaccurate speed readings and erratic transmission shifting.
  • Speedometer: A faulty speed sensor or a broken connection in the speedometer circuit can result in inaccurate speed readings.
  • Electrical Issue: A blown fuse or a short circuit in the wiring can cause various electrical issues in the vehicle's systems.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

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Tuffy Tire & Auto Service Center - Grandview

4.7
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2.39 mi
1524 W 5th Ave
Columbus, OH
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Excite Auto Repair & Towing

4.4
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5.94 mi
3430 Westerville Road
Columbus, OH
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All In Auto Service

4.9
(25)
6.56 mi
5200 Fisher Road
Columbus, OH
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Closes 6:00 PM
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Tuffy Tire & Auto Service - Grove City

4.4
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6.67 mi
2131 Stringtown Rd
Grove City, OH
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What are the initial diagnostic steps to take when the speedometer isn't working on a 2015 Ram ProMaster 1500?

When faced with a malfunctioning speedometer on a 2015 Ram ProMaster 1500, it's essential to adopt a systematic diagnostic approach. Begin by checking the speed sensor, which is typically located on the transmission; ensure it is neither damaged nor disconnected, as a faulty sensor is a common culprit for speedometer failure. Next, inspect the wiring and connections associated with the speed sensor for any signs of wear, corrosion, or looseness, as these issues can disrupt the signal needed for accurate readings. Utilizing a diagnostic scanner to check for error codes can provide valuable insights into any underlying problems related to the speedometer or speed sensor. If these initial checks do not reveal the issue, proceed to test the speedometer cluster itself, ensuring that power and ground connections are intact and that the cluster is functioning correctly. Finally, verify the vehicle's actual speed by driving and observing the speedometer's response; this will help determine whether the speedometer is entirely non-functional or simply providing inaccurate readings. By following this structured approach, you can effectively diagnose and address the speedometer issue in your Ram ProMaster, potentially saving time and repair costs.

What are the common causes for a malfunctioning speedometer in a 2015 Ram ProMaster 1500?

When your speedometer in a 2015 Ram ProMaster 1500 is malfunctioning, it can be frustrating, but understanding the common causes can help you diagnose the issue effectively. One of the primary culprits is often a faulty vehicle speed sensor, which is responsible for relaying speed information to the speedometer. If this sensor is malfunctioning, it can lead to inaccurate readings. Additionally, check for any wiring issues; damaged or loose connections can disrupt the signal and cause the speedometer to behave erratically. Another area to investigate is the instrument cluster itself, as internal malfunctions can also result in speedometer problems. Don’t overlook the possibility of a blown fuse, which can cut power to the speedometer or instrument cluster, leading to a complete failure. Lastly, if the speedometer has been recently replaced or serviced, it may require recalibration to ensure it displays accurate speed readings. By systematically checking these components, you can identify the root cause of the malfunction and take the necessary steps to fix it.

How urgent is it to address the non-functioning speedometer in a 2015 Ram ProMaster 1500?

Addressing a non-functioning speedometer in your 2015 Ram ProMaster 1500 is not just a matter of convenience; it is an urgent necessity. A malfunctioning speedometer can lead to serious safety risks, as it prevents you from accurately monitoring your speed, increasing the likelihood of speeding and potential accidents. Moreover, driving without a functioning speedometer can result in legal repercussions, including fines or penalties for exceeding speed limits unknowingly. This issue can also indicate underlying mechanical problems that may affect the overall performance of your vehicle, leading to more significant and costly repairs down the line. Additionally, if you plan to sell your vehicle in the future, a non-functioning speedometer can significantly diminish its resale value, as prospective buyers are often wary of unresolved mechanical issues. Therefore, it is crucial to prioritize the repair of your speedometer to ensure your safety, comply with legal standards, maintain vehicle performance, and protect your investment.

Related 2015 Ram ProMaster 1500 Problems

Read about related problems experienced by other Ram ProMaster 1500 drivers like you.

Audi A6 Quattro gas and speedometer gauges not working, possibly due to faulty sensor
Some Audi A6 Quattro owners report experiencing issues with their gas and speedometer gauges not functioning, often attributed to a faulty sensor. Common causes include problems with the vehicle speed sensor (VSS), a malfunctioning speedometer, or electrical issues. A faulty speed sensor can lead to inaccurate speed readings, affecting fuel flow and ignition timing, and may result in erratic behavior or a complete stoppage of the speedometer. Additionally, issues with the sending unit, bad wiring in the gas indicator circuit, or problems in the speedometer circuit can impact the fuel gauge's functionality. In some instances, a malfunctioning speed sensor may even trigger the ABS light and cause the speedometer to stop working altogether. It is advisable for owners experiencing these issues to have the sensor checked and replaced if necessary to restore proper functionality.
2 model years affected
Avg Mileage: 1162,500
6 others reported problem
2 comments
Pontiac Grand Am speedometer not functioning, fluctuating RPMs, and overheating issue
Some Pontiac Grand Am owners report experiencing issues such as a malfunctioning speedometer, fluctuating RPMs, and overheating problems. These issues may stem from a faulty vehicle speed sensor (VSS), a defective speedometer, or electrical problems affecting the speedometer. Additionally, fluctuating RPMs could be linked to problems with the instrument cluster, speed sensor, or the engine itself. Overheating concerns might arise from a malfunctioning temperature gauge, faulty cooling system components, or issues with the coolant temperature sensor. To address these concerns, owners are advised to check the VSS circuit for malfunctions, inspect the instrument cluster and speed sensor, and ensure the cooling system is functioning properly by monitoring coolant levels and the radiator. Scanning the OBDII port for diagnostic trouble codes (DTC) related to VSS circuit issues may also provide valuable insights for troubleshooting.
4 model years affected
Avg Mileage: 1130,762
9 others reported problem
4 comments
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