Ford Taurus Transmission Speed Sensor Guide for 2011-2019 Models
Solve erratic shifting and speedometer problems by understanding your Taurus's speed sensors.
- Your Taurus has two main transmission speed sensors: an external Input Sensor (ISS) and an internal Output Sensor (OSS).
- A trouble code is essential for diagnosis. P0715 points to the easy external sensor, while P0720/P0722 indicates a failure of the difficult internal sensor.
- Replacing the internal Output Speed Sensor (OSS) is a complex, expensive job that should be done by a professional.
- Symptoms almost always include harsh shifting, an erratic speedometer, and a check engine light.
Understanding Your Taurus's Speed Sensors
If you're experiencing harsh shifting or your speedometer is acting up, a failing speed sensor is a likely culprit. However, it's crucial to know that the 2011-2019 Ford Taurus, equipped with the 6F50 or 6F55 automatic transmission, has two key speed sensors, and they are not created equal when it comes to replacement.
- Input Speed Sensor (ISS / TSS): This sensor is located on the outside of the transmission case. It is generally accessible and can be replaced with moderate difficulty by a DIY mechanic. 🎬 See this 10-minute fix for erratic speedometer and shifting issues
- Output Speed Sensor (OSS): This sensor is located inside the transmission, behind the valve body. Replacing the OSS is a major repair that requires draining the transmission, removing the side cover, and taking out the valve body. This is a difficult job that most people should leave to a professional transmission shop.
Diagnose Before You Buy
The most important step is getting the correct diagnosis. A diagnostic trouble code (DTC) from an OBD-II scanner is essential. A P0715 code points to the external Input Speed Sensor, while P0720 or P0722 codes point to the internal Output Speed Sensor. Replacing the wrong part will not fix the problem.
Common Failure Symptoms
🎬 Watch: 5 common symptoms of a bad transmission speed sensor
A failing transmission speed sensor sends incorrect information to your car's computer, leading to a number of problems. The most common issues reported by Taurus owners include:
- Harsh or Erratic Shifting: The transmission may slam into gear, hesitate, or shift at the wrong times.
- Inaccurate or Dead Speedometer: The speedometer needle may jump around wildly or drop to zero while driving.
- Check Engine Light: A sensor failure will almost always trigger the check engine light.
- Transmission in "Limp Mode": The transmission may get stuck in one gear (often 3rd or 5th) to prevent further damage, resulting in poor acceleration.
- Loss of Cruise Control: The cruise control system relies on accurate speed data and will not function if the sensor is faulty.
Choosing the Right Aftermarket Sensor
While a Motorcraft sensor is the original equipment part, several aftermarket brands offer quality replacements. It's important to balance cost and quality, especially since labor can be expensive if the part fails prematurely.
| Brand Tier | Brands | Notes |
|---|---|---|
| OEM / Premium Aftermarket | Motorcraft, Delphi, NGK, Standard Ignition (SMP) | These brands are known for high-quality manufacturing and reliability. They are often trusted by professional mechanics. For the difficult-to-replace internal OSS, choosing a brand from this tier is highly recommended to avoid repeat labor costs. |
| Standard Aftermarket | Walker Products, Global Parts (GPD) | These brands provide a more budget-friendly option. They can be a good choice for the easily accessible external Input Speed Sensor (ISS), where replacement is less labor-intensive if the part fails. |
Cost to Replace a Ford Taurus Speed Sensor
The cost varies dramatically depending on which sensor has failed.
| Item | Estimated Cost | Notes |
|---|---|---|
| Input Speed Sensor (Part) | $20 - $60 | This is the external sensor and is relatively inexpensive. |
| Output Speed Sensor (Part) | $25 - $85 | The internal sensor part cost is also low, but this does not include labor. |
| Shop Labor (Input Sensor) | $100 - $200 | About 1-1.5 hours of labor to access and replace the external sensor. |
| Shop Labor (Output Sensor) | $600 - $1200+ | A significant, multi-hour job requiring transmission disassembly. 🎬 Watch this teardown to see the internal sensor's complex location This is where the real cost is. |
Frequently Asked Questions
Are there any recalls for the speed sensors on the 2011-2019 Taurus?
No, there are no specific recalls for the transmission speed sensors on the Ford Taurus for these model years. Ford did issue a warranty extension program (19N01) for a similar issue on other vehicles like the F-150, which acknowledged failures causing codes P0720 and P0722, but it did not officially include the Taurus.
What is the difference between a transmission speed sensor and an ABS sensor?
Transmission speed sensors (ISS and OSS) measure the rotational speed inside the transmission to control shifting. ABS sensors are located at each wheel and measure wheel speed for the Anti-lock Braking System and traction control. While both measure speed, they serve different systems. An ABS sensor failure typically causes ABS and traction control warning lights, not the harsh shifting associated with a transmission sensor failure.
Can I replace the Output Speed Sensor (OSS) myself?
For most DIY mechanics, the answer is no. The OSS is located inside the 6F50 transmission and requires removing the valve body to access it. This is a complex job that can cause more damage if not done correctly. It is best left to a qualified transmission technician. The external Input Speed Sensor (ISS), however, is a feasible DIY replacement for those with some mechanical experience.
Do I need to replace both sensors at the same time?
You only need to replace the sensor that has failed. A proper diagnosis with an OBD-II scanner will give you a specific trouble code (like P0715 for the input sensor or P0720/P0722 for the output sensor) that points to the faulty part. Since replacing the output sensor is so labor-intensive, you would not want to do it unless it is confirmed to be the cause of the problem.
Helpful Videos
Technical Specifications
OEM Part Numbers: 9L8Z7M101A 9L8Z7M101B DL8Z7M101A
The 2011-2019 Ford Taurus uses a 6-speed 6F50 or 6F55 automatic transmission. The speed sensors are magnetic hall-effect sensors that generate a signal based on shaft rotation. The Output Speed Sensor (OSS) is located internally behind the valve body, while the Input Speed Sensor (TSS) is located externally on the transmission case.
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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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