Ford Ranger Vehicle Speed Sensor: A Guide for 2006-2013 Models
Fix your Ford Ranger's erratic speedometer and harsh shifting by understanding its speed sensor system.
- Your Ranger has two main speed sensors; identify which one is bad before ordering a part. The rear axle sensor affects the speedometer, while the transmission sensor affects shifting.
- A bad speed sensor will cause more than just a faulty speedometer; it can lead to poor shifting, ABS light activation, and failed cruise control.
- Replacing the most common point of failure, the rear axle sensor, is a very easy DIY job that requires only basic tools and about 30 minutes.
- For this part, high-quality aftermarket brands like Standard Ignition or Delphi offer a reliable alternative to the more expensive OEM Motorcraft part.
Is It the VSS or the OSS? Understanding the Two 'Speed Sensors'
Symptoms of a Failing Vehicle Speed Sensor
When a speed sensor goes bad, your truck's computer gets confusing information. This can lead to several noticeable problems:
- Erratic or Dead Speedometer: The needle may jump around wildly, read incorrectly, or not move at all.
- Harsh or Incorrect Shifting (Automatics): The transmission may shift hard, delay shifts, or get stuck in one gear because it doesn't know how fast the truck is moving.
- Check Engine Light: A faulty speed sensor will often trigger a Check Engine Light and store a diagnostic trouble code, most commonly P0500.
- ABS Light: Since the rear axle sensor is part of the Anti-lock Braking System (ABS), a failure will almost always turn on the ABS warning light.
- Cruise Control Won't Work: The cruise control system relies on a steady speed signal. If the signal is bad, the cruise control will not engage.
Known Issues: TSB for 6R80 Transmission
Ford issued a Customer Satisfaction Program (19N01) for some 2011-2013 Ford Rangers with the 6R80 automatic transmission. This program addresses a known issue where the Output Shaft Speed (OSS) sensor inside the transmission fails. This can cause an unintended downshift to first gear, even at speed, and will trigger trouble codes like P0720 or P0722. The fix involves replacing a part inside the transmission called the molded leadframe. While the program has expired, it confirms this is a known failure point on these models.
Choosing the Right Aftermarket VSS: Brand Quality
For a simple sensor, you don't always need to pay dealer prices. However, quality can vary between aftermarket brands. Here’s a breakdown of what to expect:
| Brand Tier | Brands | Assessment |
|---|---|---|
| OEM / Premium Aftermarket | Motorcraft, Delphi, NGK, Standard Ignition (SMP) | Motorcraft is the original Ford part and the benchmark for quality and fit. Brands like Delphi, NGK, and Standard Ignition are well-respected in the industry and are generally considered reliable, high-quality alternatives to OEM. Some owners have even reported aftermarket brands like Standard outlasting the original part. |
| Standard / Economy | Walker Products, True Tech, Global Parts | These brands offer a significant cost saving. For a simple, easy-to-access part like the rear axle sensor, a budget-friendly option can be a good value. However, for electronic components, failure rates can sometimes be higher than premium brands. Given the low replacement cost and ease of installation, the risk is minimal for many DIYers. |
DIY Replacement: Rear Axle Speed Sensor
Replacing the rear axle speed sensor is a great job for a beginner. It's located directly on top of the rear differential, sometimes called the 'pumpkin'. It is held in by a single 10mm bolt. The hardest part is often breaking the sensor free from the rust and grime. Gently prying with a flathead screwdriver can help, but be careful not to damage the differential housing. 🎬 Watch this step-by-step guide to replacing the rear ABS sensor. Always clean the mounting surface before installing the new sensor to ensure a good fit.
Frequently Asked Questions (FAQ)
Where is the Vehicle Speed Sensor on my 2006-2013 Ford Ranger?
You likely have two. The main one for the speedometer is the ABS sensor on top of the rear differential. If you have an automatic transmission, you also have an Output Shaft Speed (OSS) sensor on the driver's side of the transmission housing.
Can I replace the VSS myself?
Yes, both the rear axle sensor and the transmission OSS sensor are considered easy to replace. Each is held by a single bolt and has a simple electrical connector. 🎬 See how to swap out the transmission output shaft sensor. You can do the job with basic hand tools in under an hour.
Why is my ABS light on if the speed sensor is bad?
The main speed sensor on the rear axle is also the sensor for the rear anti-lock brakes. When it fails, it triggers both the Check Engine Light (for the speed signal) and the ABS light (for the brake system).
What's the difference between an OEM and an aftermarket speed sensor?
OEM (Motorcraft) is the exact part Ford installed at the factory. Aftermarket sensors are made by other companies to fit your truck. High-quality aftermarket brands like Standard or Delphi are often just as good as OEM for a lower price. Budget brands are cheaper still, but may not last as long.
Helpful Videos
Technical Specifications
OEM Part Numbers: 6L5Z-7H103-B 4L5Z-7H103-AA DY-1206
The primary vehicle speed is determined by a 2-wire magnetic sensor located on the rear differential housing. The automatic transmission uses a separate Output Shaft Speed (OSS) sensor, also a 2-wire magnetic type, located on the transmission case.
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.
- Ford Ranger:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is It the VSS or the OSS? Understanding the Two 'Speed Sensors'
- Symptoms of a Failing Vehicle Speed Sensor
- Known Issues: TSB for 6R80 Transmission
- Choosing the Right Aftermarket VSS: Brand Quality
- DIY Replacement: Rear Axle Speed Sensor
- Frequently Asked Questions (FAQ)
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