Ford Taurus Automatic Transmission Output Shaft Speed Sensor Guide (1996-2007)
Experiencing erratic shifting or a dead speedometer in your Ford Taurus? Your Output Shaft Speed Sensor might be the culprit.
- A faulty OSS is a very common problem on the 1996-2007 Taurus, causing harsh shifting and a dead speedometer.
- This is an easy and inexpensive DIY repair that most owners can complete in under 30 minutes with basic tools.
- Aftermarket sensors from brands like Standard Ignition or other value brands are a cost-effective and reliable solution for this specific part.
- Look for trouble codes P0720 and P0722, as they are strong indicators that the OSS has failed.
Symptoms of a Failing Output Shaft Speed Sensor
When the OSS on your Taurus starts to fail, the signs are usually hard to ignore. The computer gets bad information, which can cause a number of problems. This is a very common issue on all years of the Taurus. Here’s what to look for:
- Erratic or Harsh Shifting: The transmission might slam into gear, hesitate, or shift at the wrong times. Sometimes it may feel like it slips out of gear and then suddenly engages.
- Inaccurate or Dead Speedometer: 🎬 Watch how a faulty sensor causes erratic speedometer and shifting issues. The speedometer needle may jump around, drop to zero while driving, or not move at all.
- Flashing Overdrive (O/D) Light: A blinking O/D light on the dash is a common signal that the transmission computer has detected a problem, often related to the OSS.
- Check Engine Light: A failing sensor will trigger the Check Engine Light. Common trouble codes include P0720 (OSS Circuit Malfunction) and P0722 (OSS No Signal). 🎬 See this guide for diagnosing and repairing the P0720 error code.
- Cruise Control Not Working: The cruise control system relies on accurate speed data from the OSS. If the sensor is faulty, cruise control will likely not engage.
Don't Confuse the Sensors
Your Taurus has two main transmission speed sensors: the Output Shaft Speed (OSS) sensor and the Turbine Shaft Speed (TSS) sensor (also called the Input Shaft Speed or ISS sensor). They look similar but are not interchangeable. This guide is specifically for the OSS, which reads the final output speed of the transmission.
Choosing the Right Aftermarket Sensor
For a simple electronic part like a speed sensor on this generation of Taurus, an aftermarket part is a perfectly reasonable and cost-effective choice. The technology is not complex, and quality aftermarket brands produce reliable sensors. OEM (Motorcraft) parts are excellent but come at a higher price. When choosing an aftermarket part, you're generally looking at two tiers:
- Name-Brand Aftermarket (e.g., Standard Ignition): Brands like Standard Motor Products (SMP) have a long history. While some of their parts are sourced globally, they are generally considered a quality replacement option that meets or exceeds OEM standards. They are a reliable choice for a balance of price and quality.
- Value-Priced Brands (e.g., True Tech): These brands focus on providing a functional part at the lowest possible price. While there is less brand history available for specific parts like this sensor, they can be a good option for a budget-conscious repair. For a straightforward part like this, the risk is relatively low.
For this specific repair, since the labor is simple and the part is inexpensive, either tier of aftermarket part is a viable option. A name-brand part may offer extra peace of mind, but a value-priced sensor is unlikely to cause issues and can save you money.
Cost to Replace the Sensor
The cost to replace the OSS on a 1996-2007 Taurus is low, especially if you do it yourself. The part itself is affordable, and labor is minimal.
| Part/Service | Estimated Cost |
|---|---|
| New Aftermarket Sensor | $39 - $66 |
| New OEM (Motorcraft) Sensor | $62 - $218 |
| Shop Labor | $104 - $153 |
| Total (DIY) | $39 - $66 |
| Total (Shop) | $143 - $219 |
Frequently Asked Questions
Where is the OSS located on my Taurus?
The Output Shaft Speed Sensor is located externally on the transmission case. On most AX4N and AX4S transmissions used in these models, you can access it from the top of the engine bay. It's typically found below the exhaust manifold, near the back of the transmission. It is held in by a single 8mm or 10mm bolt. You may need to remove the air filter box for better access.
Is this a difficult job to do myself?
No, this is a great DIY job for beginners. It typically takes less than 30 minutes. You only need basic hand tools like a socket wrench and an extension. The process involves disconnecting the electrical connector, removing one bolt, wiggling the old sensor out, and installing the new one. 🎬 Follow this step-by-step walkthrough to replace the sensor yourself. Make sure the new O-ring is in place on the new sensor.
Are there any recalls for this part?
No, there are no specific recalls on the 1996-2007 Ford Taurus for the automatic transmission output shaft speed sensor itself. However, Ford did issue a Technical Service Bulletin (TSB 07-21-11) for some 2007-2008 models (which may include late-production 2007 Taurus) for intermittent shorts in the OSS or TSS sensors that could cause harsh shifting and store codes like P0720 and P0722. This indicates it's a known failure point.
What happens if I don't replace it?
Driving with a bad OSS is not recommended. While the car may still move, you will experience unpredictable and harsh shifting, which puts extra stress on your transmission's internal components. You will also have an unreliable speedometer and no cruise control. It's a safety and reliability issue that should be addressed promptly.
Helpful Videos
Technical Specifications
OEM Part Numbers: F7RZ-7H103-BA 6L3Z-7H103-AA F6DZ-7H103-A
Typically held in by a single bolt, features a 2-pin electrical connector, and includes a rubber O-ring to seal against 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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