C0050: Left Rear Wheel Speed Sensor Circuit Malfunction
Can you still drive? Yes, standard brakes function normally. ABS will not work on the left rear wheel. Drive conservatively in poor conditions.
What Does C0050 Mean?
Code C0050 indicates that the ABS control module has detected a problem with the left rear wheel speed sensor circuit. Rear wheel speed sensors are particularly prone to damage from road debris, water, and salt exposure. Without a valid signal, ABS and stability control cannot properly modulate that wheel.
Need to read your codes?
An OBD-II scanner lets you read and clear diagnostic trouble codes from your vehicle's computer. Most scanners work with any car made after 1996.
Browse OBD-II Scanners on AmazonCommon Causes
- Failed left rear wheel speed sensor
- Corroded sensor connector exposed to road spray
- Damaged wiring along the rear axle or suspension
- Bent or rusted tone ring
- Rear wheel bearing wear
Symptoms
- ABS light on
- Traction control warning light
- Stability control disabled
- Rear ABS not functioning
- Vehicle may pull during ABS braking events
Diagnostic Steps
- 1Read ABS codes with scan tool
- 2Inspect left rear sensor and wiring for physical damage
- 3Check sensor connector for moisture and corrosion
- 4Measure sensor resistance at the ABS module connector
- 5Inspect tone ring for rust, cracks, or missing teeth
- 6Compare all four wheel speed sensor readings during a test drive
Recommended Parts & Tools
rear wheel speed sensor
ABS sensor connector
dielectric grease
wire loom protector
Estimated Repair Cost
| Type | Estimated Cost |
|---|---|
| Total Repair Cost Range | $40 - $350 |
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Chat with AI About C0050Commonly Affected Vehicles
Related Recalls
1 Active Recall — 2026 Ford F-150
The following NHTSA safety recalls have been issued for this vehicle. Contact your dealer to check if your vehicle is affected.
ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL
Ford Motor Company (Ford) is recalling certain 2021-2026 F-150, 2022-2026 F-250 SD, F-350 SD, F-450 SD, F-550 SD, Maverick, 2024-2026 Ranger, 2023-2026 F-600 SD, 2022-2027 Lincoln Navigator, Expedition, and 2026 E-Transit vehicles. When towing a trailer, the integrated trailer module (ITRM) may lose communication with the vehicle, possibly causing a loss of brake and turn signal lights, or a loss of brake function. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 108, " Lamps, Reflective Devices, and Associated Equipment."
Remedy: The integrated trailer module software will be updated by a dealer, or through an over-the-air (OTA) update, free of charge. Owner notification letters are expected to be mailed March 17, 2026. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 26C10. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on NHTSA.gov beginning March 17, 2026.
Data provided by the National Highway Traffic Safety Administration (NHTSA).
Frequently Asked Questions
Why are rear wheel speed sensors more prone to failure?
Rear sensors are more exposed to road debris, water spray, and salt. Their wiring also runs along the suspension where it can be snagged or chafed.
Can I replace the rear wheel speed sensor myself?
Yes, rear wheel speed sensors are a moderate DIY job. Most bolt onto the knuckle or hub and require basic hand tools. The main challenge is freeing corroded fasteners.
Community Fix Reports
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