OBD-II trouble code
C0041: Right Front Wheel Speed Sensor Circuit Range/Performance
The ABS module is receiving a right front wheel speed signal, but the reading is implausible — out of range, noisy, or inconsistent with the other wheels. ABS and traction/stability control are usually disabled, but normal braking still works.
Quick facts
- System
- Chassis
- Category
- ABS / Wheel Speed
- Severity
- Medium severity
- Drivable
- Usually safe to drive short-term
- Repair cost range
- $100 – $700
- DIY difficulty
- Intermediate DIY
What does C0041 mean?
Every wheel has a speed sensor that reports how fast that wheel is turning to the anti-lock brake system (ABS) module. The module compares all four wheel speeds to catch a wheel that is about to lock under braking (ABS), a wheel that is spinning (traction control), or a vehicle that is starting to slide (stability control). C0041 is the range/performance version of the right front wheel speed fault: unlike C0040, where the circuit is electrically dead (open or shorted), a range/performance code means a signal is present but the module judges it to be wrong — the value is out of the expected range, drops out intermittently, is electrically noisy, or does not agree with the other three wheels for the vehicle's actual motion.
Because the safety systems need a dependable signal from every wheel, an implausible reading from one corner causes the module to switch off ABS, traction control, and stability control and light the matching dash warnings. Your ordinary hydraulic brakes are not affected — the vehicle still stops normally — but the anti-lock and traction/stability functions that help during a hard stop or on slippery roads stay disabled until the fault is repaired.
Range/performance faults are classically caused by a marginal air gap, a contaminated or damaged tone/encoder ring, or wiring that is intermittently making and breaking contact — problems that come and go rather than failing outright. A very common, often-overlooked cause on GM vehicles (documented in a GM technical service bulletin) is metallic debris collecting on the wheel bearing's magnetic encoder ring, which produces an erratic signal and can frequently be cleaned rather than replaced. Note that C0041 is the SAE-generic designation for the right front wheel speed sensor range/performance fault; some manufacturers — GM in particular — assign wheel-speed faults to different C-code numbers or add a sub-code, so confirm the exact definition in service data for your specific vehicle before replacing parts.
Common causes
- Excessive or incorrect sensor-to-ring air gap
- Metallic debris on the wheel bearing's magnetic encoder ring (often cleanable)
- Cracked, chipped, rusted, or contaminated tone/reluctor ring
- Intermittent connection at a corroded or loose sensor connector
- Chafed or partially broken wiring flexing with the suspension
- Worn wheel hub/bearing allowing runout that upsets the signal
- Failing right front wheel speed sensor
Symptoms
- ABS warning light on
- Traction control and stability control (ESC) warning lights on
- ABS, traction, and stability features disabled, sometimes intermittently
- Normal (base) braking still works
- Right front wheel speed drops out or spikes erratically on a scan tool
Diagnostic steps
- 1.Scan the ABS module and record all C-codes and any sub-codes to confirm the wheel and the fault type (range/performance versus open or shorted).
- 2.Graph all four wheel-speed live-data values while driving slowly above 10 mph; a right front reading that drops to 0 mph or spikes while the others track smoothly confirms the affected corner.
- 3.Inspect the right front sensor, connector, and wiring for corrosion, chafing, or a loose connection, wiggling the harness while watching live data.
- 4.Remove the sensor and inspect the magnetic encoder/tone ring for metallic debris, rust, cracks, or missing teeth; clean debris before condemning parts.
- 5.Measure and correct the sensor air gap and check for wheel-bearing play that could cause runout.
- 6.Repair or replace the sensor or wiring, clear the codes, and road-test to confirm all four wheel-speed signals track correctly.
Repair cost
$100 – $700
A wheel speed sensor is a common, moderate-cost repair: parts often run $30-$150 with about an hour of labor, so many C0041 repairs land around $100-$300. Cleaning debris off the encoder ring or correcting an air gap can cost little to nothing. If the sensor is integrated into the wheel hub/bearing assembly, replacing the hub raises the total toward $400-$700. Inspect and clean before buying parts.
Estimate your repair
Run the numbers for your vehicle
Open the Repair Cost Estimator with wheel speed sensor replacement preselected. Adjust labor rate and vehicle category to fit your situation.
DIY vs shop
This is an intermediate DIY job. It usually involves diagnostic steps, specialty parts, and some careful work in tight spaces. If you have the tools and a service manual or trustworthy video for your specific vehicle, it is achievable in a weekend. Otherwise, a competent independent shop will be faster.