Ford E-250 Econoline Rear ABS Wheel Speed Sensor Guide (1990-1994)
Is your ABS light on or your speedometer acting up? This guide covers the single most common cause on your van.
- The 1990-1994 E-250 uses a single ABS sensor on the rear differential for ABS, speedometer, and transmission shifting signals.
- An ABS light combined with speedometer or shifting problems almost always points to this sensor failing.
- Replacement is very easy for a DIYer, requiring only basic tools and about 30 minutes.
- Check for the critical fire-risk recall (05S28) related to the speed control deactivation switch, which is separate from this sensor.
Is Your ABS Light On? Understanding the Rear Speed Sensor
If the amber ABS warning light is illuminated on your dash, a faulty rear wheel speed sensor is the most likely culprit on these vans. This sensor, also called a Vehicle Speed Sensor (VSS), is located right on top of the rear differential housing, often called the "pumpkin". It's held in by a single bolt. Its job is to read a toothed ring inside the differential to measure how fast the rear wheels are turning. This information is critical for the Rear Wheel Anti-Lock (RWAL) brake system. When it fails, the ABS computer disables the system as a safety measure, which turns on the warning light.
Choosing the Right Aftermarket Sensor
For a vehicle of this age, aftermarket sensors offer excellent value and are widely available. There is little practical difference in day-to-day performance compared to a new old stock (NOS) OEM part for this specific component. The key is choosing a brand with a good reputation for electronic parts.
- Good Tier (Recommended): Brands like Delphi and Standard Ignition (SMP) are well-regarded in the industry. Delphi has a long history as an original equipment manufacturer for other car brands, and their aftermarket parts are generally considered reliable. Standard Ignition is a trusted name that has been making quality replacement parts for decades.
- Standard Tier: Dorman is a very common aftermarket brand that produces a huge range of parts. While some mechanics have mixed opinions on their sensor quality, they are a popular and accessible option. NGK, primarily known for ignition parts, also offers ABS sensors. While they have a great reputation in other areas, their ABS sensors are less common but are generally considered a reliable choice.
Pro Tip: Given the low cost of this part, choosing a sensor from the "Good Tier" is a smart investment for long-term reliability. The price difference is often minimal.
Cost of Replacing the ABS Speed Sensor
| Part Type | Price Range |
|---|---|
| New Aftermarket | $24.03 - $38.40 |
| New OEM (Ford) | $22.00 - $45.00+ (if available) |
| Shop Labor | $50 - $100 |
Prices are estimates and may vary based on location and supplier.
Important Recall Information
While there are no recalls for the ABS sensor itself, a major safety recall (NHTSA 05S28 / 06V286) was issued for the Speed Control Deactivation Switch on the brake master cylinder for these vans. This switch can leak brake fluid and cause a fire, even when the van is off. It is critical to ensure this recall has been performed on your vehicle. A Ford dealer can check for you using your VIN.
Frequently Asked Questions (FAQ)
Where is the ABS sensor located on my 1990-1994 E-250?
It is on top of the rear differential housing. Look for a small sensor with a wire coming out of it, held in place by a single bolt.
Can I replace this sensor myself?
Yes, this is a very easy DIY job. It requires basic hand tools, like a socket wrench. Simply unplug the electrical connector, remove the one bolt, and pull the old sensor out. The hardest part might be cleaning any rust out of the sensor hole before installing the new one.
What happens if I ignore a bad ABS sensor?
Your anti-lock brakes will not work, meaning your rear wheels can lock up and skid during a hard stop. You may also have an inaccurate or non-working speedometer and experience harsh or unpredictable automatic transmission shifting, which can cause extra wear on your transmission over time.
Do I need a special tool to read the ABS codes?
For the 1990-1994 models, which are pre-OBD-II, you may need a specific scanner capable of reading older Ford ABS codes. The diagnostic connector is located in the engine bay. However, since the symptoms of a bad rear sensor are so distinct (ABS light, speedo/shifting issues), many owners replace the sensor first as it is the most common and affordable fix.
Technical Specifications
OEM Part Numbers: F3TZ-2L373-A F85Z-2L373-AB F85Z-2L373-AC F85Z-9E731-AB
This vehicle uses a single Rear Wheel Anti-Lock (RWAL) speed sensor located on the rear differential.
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 E-250 Econoline: