C0050 medium Severity

C0050: Right Rear Wheel Speed Sensor Circuit Malfunction

ABS, traction control, and stability systems may be disabled or impaired; normal driving possible with caution.

Overview

C0050 ABS right rear wheel speed sensor circuit fault ABS/ESC wheel speed sensor malfunction rear sensor wiring or tone ring issue

Common Symptoms

  • ABS warning light illuminated
  • Traction/stability control warning
  • Erratic or missing speed data for right rear wheel
  • Unexpected ABS activation or reduced braking performance

Most Common Causes

Faulty right rear wheel speed sensor high

Sensor does not provide proper signal to ABS module

Damaged or corroded sensor wiring/connector high

Wire abrasion or connector corrosion interrupts signal

Damaged tone/reluctor ring at rear wheel medium

Cracks or missing teeth affect sensor signal

Internal ABS control module fault low

Module misinterprets sensor signal when other causes ruled out

Diagnostic Steps

  1. Use an ABS-capable scan tool to read DTC and live wheel speed data
    Expected: C0050 present; right rear wheel speed data inconsistent or absent
    Interpretation: Confirms active fault and identifies sensor signal issue
  2. Visually inspect right rear wheel speed sensor, wiring harness, and connectors
    Expected: No visible damage, corrosion, or loose connections
    Interpretation: If issues present, likely cause; repair wiring or connector
  3. Measure sensor output with multimeter/oscilloscope while spinning wheel
    Expected: Clean AC/digital pulses proportional to wheel speed
    Interpretation: Absent or erratic signal confirms faulty sensor or tone ring
  4. Inspect tone/reluctor ring condition
    Expected: No cracks, missing teeth, or debris buildup
    Interpretation: Physical damage affects sensor signal; replace if faulty
  5. Check continuity between sensor and ABS module
    Expected: Circuit continuity within specifications
    Interpretation: Opens or shorts warrant wiring repair

Repair Solutions

Replace right rear wheel speed sensor medium
Estimated Cost: $70 - $200

OEM-quality sensor recommended

Repair or replace damaged wiring/connector medium
Estimated Cost: $60 - $180

Includes corrosion cleanup and securing harness

Replace damaged tone/reluctor ring medium
Estimated Cost: $80 - $250

May require hub disassembly

Replace ABS control module (if verified faulty) hard
Estimated Cost: $800 - $2000

High cost; confirm with thorough diagnosis

Common Misdiagnoses

Avoid these common diagnostic mistakes:

  • Steering position sensor fault (less common alternate interpretation depending on model)

Frequently Asked Questions

What does the C0050 code mean?

Right Rear Wheel Speed Sensor Circuit Malfunction is the standard definition for C0050. This diagnostic code is triggered when the ECU detects a problem in the Sensors.

Is it safe to drive with a C0050 code?

With a severity level of medium, aBS, traction control, and stability systems may be disabled or impaired; normal driving possible with caution.

Symptoms associated with DTC C0050

You may experience the following: ABS warning light illuminated, Traction/stability control warning, Erratic or missing speed data for right rear wheel.

What parts fail when C0050 is set?

The most common causes are: Faulty right rear wheel speed sensor, Damaged or corroded sensor wiring/connector, Damaged tone/reluctor ring at rear wheel.

Repair cost breakdown for C0050

Expect to pay around $180 if the issue is a Repair or replace damaged wiring/connector, but up to $2000 if the Replace ABS control module (if verified faulty) needs replacement.

What cars are affected by the C0050 code?

Yes, C0050 is a generic code that applies to all OBD-II compliant vehicles, including Ford, Toyota, Honda, Chevrolet, Nissan, Dodge, BMW, and more.

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