A Ram 1500 Owner's Guide to Vehicle Speed Sensors (2011-2019)
Solve erratic speedometer and shifting problems by choosing the right speed sensor for your truck.
- Diagnose first: Shifting problems and a dead speedometer often point to the transmission output sensor, while ABS/ESC lights point to a wheel speed sensor.
- Use an OBD-II scanner that can read ABS codes to pinpoint which sensor has failed, saving time and money.
- For electronic sensors, spending a little more on a reputable aftermarket brand like Delphi or Standard Ignition can prevent future headaches.
- Replacing the transmission output sensor is an easy DIY job, typically requiring only a single bolt to be removed.
Is It a Transmission Sensor or a Wheel Sensor?
Before buying a part, it's important to know that 2011-2019 Ram 1500s use two types of sensors to measure speed. A failure in either can cause problems, but the symptoms are different. Knowing the symptoms helps you buy the right part the first time.
Transmission Output Speed Sensor: A problem here usually affects how the truck drives. Look for an erratic speedometer, harsh shifting, or cruise control not working. This often triggers Check Engine Light codes like P0501 or P0503.
Wheel Speed Sensor (ABS Sensor): A failure here usually turns on the ABS and Electronic Stability Control (ESC) warning lights on your dashboard. Because this data is shared, it can sometimes cause speedometer and cruise control issues, too. This will set codes that start with a 'C', which can be read by most advanced OBD-II scanners.
Symptoms of a Failing Speed Sensor
When a speed sensor sends bad information, your truck can act up in confusing ways. Here are the most common signs:
- Harsh or Incorrect Shifting: The transmission may shift hard, late, or get stuck in one gear (known as 'limp mode'). This is the most common symptom when the transmission output sensor is failing.
- Erratic or Dead Speedometer: The speedometer needle may jump around, read an incorrect speed, or not move at all.
- ABS and Traction Control Lights: If the ABS or ESC/Traction Control warning lights are on, the problem is almost always one of the wheel speed sensors.
- Cruise Control Doesn't Work: The cruise control system needs a steady speed signal to function. If the signal is lost or erratic, cruise control will not engage.
Choosing the Right Aftermarket Part
For an electronic part like a speed sensor, quality matters. While OEM Mopar parts are a safe bet, several aftermarket brands offer a good balance of price and reliability. Some Ram owners in forums prefer to stick with OEM to avoid potential electronic glitches with cheaper parts.
Top-Tier Aftermarket (OEM Quality)
These brands are known for making parts for automakers and have a strong reputation for quality and reliability. They are often a safe choice when you want to avoid the higher cost of a dealer part.
- Delphi: A well-respected OEM supplier with a reputation for quality electronics.
- Standard Ignition (SMP): A long-standing brand that many professional mechanics trust for sensors and other electronic components.
Standard Replacement Aftermarket
These brands provide a dependable, budget-friendly alternative to OEM parts. They are a good fit for most DIY repairs.
- Holstein: Offers a 3-year/36,000-mile warranty and states their parts are built to match or exceed OE standards.
- Walker Products: An ISO 9001/IATF16949 certified company that engineers parts to meet or exceed OEM specifications.
- Crown Automotive: A popular brand for Jeep and truck parts, offering a wide range of replacement components.
- Rostra Powertrain: Specializes in transmission components and electronic accessories.
| Part Type | Price Range |
|---|---|
| New Aftermarket Speed Sensor | $23.02 - $47.74 |
| New OEM (Mopar) Speed Sensor | $70.00 - $95.00 |
Known Issues, Recalls, and TSBs
While there are no direct recalls for the vehicle speed sensors on 2011-2018 Ram 1500s, there are related service bulletins and recalls for similar systems.
- NHTSA Recall 24V653: Affects some 2019 models. A software issue in the ABS control module could disable the stability control system. The fix is a software update from the dealer, not a new sensor.
- TSB 21-017-16: For some trucks experiencing a P0731 (Gear Ratio Error in 1st) code, the cause may be the transmission control module software, not a faulty sensor. The fix is a software flash at the dealership. It's worth checking for TSBs before replacing parts.
Frequently Asked Questions (FAQ)
Where is the vehicle speed sensor located on a 2011-2019 Ram 1500?
Your truck has multiple speed sensors. The transmission output speed sensor is typically on the driver's side of the transmission, near the rear. The wheel speed (ABS) sensors are located at each wheel hub, behind the brake rotor.
Can I replace a speed sensor myself?
Yes, this is a DIY-friendly job for many owners. The transmission output sensor is usually held by a single bolt and is easy to access. The wheel speed sensors require removing the wheel, brake caliper, and rotor, making them more involved but still manageable with basic hand tools.
How do I know which speed sensor is bad?
The best way is to use an OBD-II scanner that can read transmission and ABS codes. A 'P' code (like P0501) points to the transmission sensor circuit, while a 'C' code points to a specific wheel speed sensor. The symptoms are also a big clue: shifting issues usually mean transmission sensor, while ABS lights mean wheel sensor.
Do I need to reset the computer after replacing the sensor?
It is a good practice to clear the trouble codes with a scanner after the repair. For transmission issues, some owners report that the truck's shifting patterns may need to relearn, which happens automatically over a few drive cycles.
Helpful Videos
Technical Specifications
OEM Part Numbers: 4799061AB 52854001AA 56028666AB 4799061
The primary 'Vehicle Speed Sensor' signal for the powertrain is often sourced from the rear wheel speed sensor or a dedicated transmission output speed sensor, depending on the specific drivetrain and year. The system uses a magnetic sensor to generate pulses that the computer translates into a speed reading.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
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