What Does C0041 Mean?
This code indicates the Electronic Brake Control Module (EBCM) has detected an abnormal signal pattern from the right front wheel speed sensor. The sensor is producing a signal that is erratic, intermittent, or inconsistent with expected values during vehicle operation compared to the other wheel speed sensors. This affects the vehicle's anti-lock braking system (ABS), traction control, and stability control systems.
Safety Warning
This is a critical safety issue. ABS, traction control, and stability control systems will be disabled or operate improperly, significantly increasing stopping distances on slippery surfaces and reducing vehicle stability during emergency maneuvers. Vehicle should be repaired immediately and driven with extreme caution until fixed.
Common Causes
35%
Damaged or contaminated tone ring (exciter ring) on the wheel hub with missing teeth, debris buildup, or corrosion affecting the magnetic field
30%
Faulty right front wheel speed sensor with internal deterioration, weak magnetic field, or physical damage from road debris
20%
Incorrect wheel speed sensor air gap due to improper installation, bearing wear, or hub runout causing inconsistent signal generation
10%
Wiring harness issues including chafed wires, loose connections, or corroded terminals in the sensor circuit causing intermittent signal loss
5%
Mismatched tire sizes or incorrect wheel/tire combination causing abnormal speed sensor readings relative to other wheels
Diagnostic Steps
1
Step 1: With the scan tool, monitor live data for all four wheel speed sensors while test driving at various speeds (10-40 mph). Compare the right front sensor reading against the other three wheels to identify erratic behavior, dropout, or inconsistent values
2
Step 2: Perform a visual inspection of the right front wheel speed sensor, wiring harness, and connector for physical damage, corrosion, loose connections, or signs of moisture intrusion. Inspect sensor mounting for proper seating and security
3
Step 3: Remove the right front wheel and inspect the tone ring on the hub assembly for missing teeth, cracks, excessive buildup of metallic debris, or rust. Clean the tone ring and sensor face thoroughly with appropriate cleaner if contaminated
4
Step 4: Using a feeler gauge or manufacturer specifications, verify the air gap between the wheel speed sensor and tone ring (typically 0.020-0.050 inches). Check for excessive wheel bearing play by attempting to rock the wheel assembly in and out
5
Step 5: With sensor disconnected, use a digital multimeter to measure sensor resistance (typically 800-1400 ohms) and compare to specification. Perform an AC voltage test by spinning the wheel while measuring sensor output (should produce 0.3-1.5V AC)
6
Step 6: Clear the code, perform a test drive under the conditions that originally triggered the fault, and verify proper sensor operation with scan tool live data. If code returns, replace the sensor or tone ring as identified by previous tests
Estimated Repair Cost
$150 - $650
Parts + labor, varies by vehicle and location
This code indicates the Electronic Brake Control Module (EBCM) has detected an abnormal signal pattern from the right front wheel speed sensor. The sensor is producing a signal that is erratic, intermittent, or inconsistent with expected values during vehicle operation compared to the other wheel sp...
The most common cause of C0041 (Right Front Wheel Speed Sensor Circuit Range/Performance (EBCM)) is: Damaged or contaminated tone ring (exciter ring) on the wheel hub with missing teeth, debris buildup, or corrosion affecting the magnetic field
Typical repair costs for C0041 range from $150 to $650, depending on the vehicle, location, and whether you do it yourself or go to a shop.
This is a critical safety issue. ABS, traction control, and stability control systems will be disabled or operate improperly, significantly increasing stopping distances on slippery surfaces and reducing vehicle stability during emergency maneuvers. Vehicle should be repaired immediately and driven with extreme caution until fixed.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to C0041 to identify the root cause.
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Quick Info
Category
Chassis
System
Anti-lock Braking System (ABS) / Stability Control
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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