OBD-II Diagnostic Trouble Code
C0041 — Right Front Wheel Speed Sensor Circuit Range/Performance
C0041 means the right front wheel speed sensor signal is out of range or performing poorly. The ABS module saw a weak, erratic or implausible signal compared with the other wheels. Excessive air gap or a tone ring problem is the usual cause.
Severity 4/5
Truck-relevant
Stop within 50 mi
Severity
Stop within 50 mi
Right Front Wheel Speed Sensor Circuit Range/Performance
Code
C0041
Category
Chassis
Subsystem
Speed
Truck-relevant
Yes
What this means for truckers
Stop within ~50 miles on a Cummins X15, Detroit DD15, PACCAR MX-13. Driving longer risks damaging adjacent components (turbo housing, head gasket, aftertreatment) and turning a $300 fix into a $3,000 fix.
Before you replace parts — try this first
C0041 on the Speed system is most often sensor pushed back from the tone ring, leaving the air gap too wide — not a dead part. On commercial diesels especially, work these in order before spending money on parts:
- Confirm the symptoms. Match what your truck is doing to the Symptoms section below. If the code is set but the symptoms are not there, clear the code and re-test after a drive cycle — it may not return.
- Clean and dry the sensor connector. Water, road salt, or oil seeping into a connector is the #1 fake sensor failure. Disconnect, look for green corrosion or moisture, spray with electrical contact cleaner, dry, reseat. Many faults clear here for $0.
- Inspect the wiring harness. Trace the wire from the sensor toward the ECM — look for chafing against the engine block, melted insulation near the turbo or exhaust, or pinch points where a clamp has rubbed through.
- Test the sensor before swapping it. Most Common Causes (below) list the expected voltage or resistance range — a $20 multimeter saves a $300 sensor swap that does not fix the problem.
- Only then, replace the part. Use the OEM or a tier-1 aftermarket. Cheap sensors throw the same code in two weeks.
Symptoms
The ABS lamp comes on, often after moving off or at low speed, and ABS may cycle unnecessarily near a stop.
Common causes
- CommonSensor pushed back from the tone ring, leaving the air gap too wide ($50–$200)
- OccasionalLoose wheel bearing ($200–$800)
- OccasionalDamaged or contaminated tone ring ($150–$600)
- OccasionalMismatched tire sizes ($0–$800)
How to fix
Push the sensor in to contact the tone ring or set the specified gap
When to use: First step
Measure sensor AC output while spinning the wheel
When to use: To confirm signal strength
Check tire sizes and wheel bearing play
When to use: When the code persists after adjustment
Affects most
No specific vehicle pattern found in our complaint database. This code can appear on any vehicle that supports OBD-II diagnostics.
Related
- → Browse all DTC trouble codes
- → Decode a VIN to check codes for your truck
- → Owner-operator maintenance guides
- → C0035 — Left Front Wheel Speed Sensor Circuit
- → C0036 — Left Front Wheel Speed Sensor Circuit Range/Performance
- → C0040 — Right Front Wheel Speed Sensor Circuit
- → C0045 — Left Rear Wheel Speed Sensor Circuit
- → C0046 — Left Rear Wheel Speed Sensor Circuit Range/Performance
Frequently Asked Questions
Can I drive with code C0041?
Drive with caution. C0041 is severity 4 — stop within ~50 miles. Most commercial diesel codes at this severity (turbo, fuel rail, transmission solenoid) can damage adjacent expensive components if left unrepaired. Get to a service location before highway-speed loads.
How much does it cost to fix C0041 on a commercial truck?
Total repair cost ranges varies depending on the root cause. The cheapest fix is usually the first one listed below — Sensor pushed back from the tone ring, leaving the air gap too wide — which is also the most common. On commercial trucks the cost is usually higher than passenger vehicles due to part availability and shop labor rates ($120–185/hour at most truck shops, vs $90–130 at general auto shops). DIY-capable fixes (sensors, hoses, filters) are at the low end; major component replacements (turbo actuator, high-pressure fuel pump, transmission solenoid pack) are at the high end. Always diagnose with a scan tool BEFORE replacing parts — guessing wrong on a $1,500 turbo actuator when the actual issue was a $30 boost hose is a common expensive mistake.
Will C0041 fail a DOT inspection?
C0041 is generally not a direct DOT inspection fail item by itself. Inspectors focus on safety-critical systems (brakes, steering, tires, lights, hours-of-service). However, the check engine light alone can trigger additional inspection scrutiny. Best practice: fix the code and clear it before a planned inspection.
What's the difference between C0041 and related codes?
C0041 is closely related to: C0035 (Left Front Wheel Speed Sensor Circuit), C0036 (Left Front Wheel Speed Sensor Circuit Range/Performance), C0040 (Right Front Wheel Speed Sensor Circuit), C0045 (Left Rear Wheel Speed Sensor Circuit). These codes share the same subsystem (speed) and often appear together. If you see this code, scan for the full code list — fixing the root cause usually clears multiple companion codes at once. If only C0041 is set without the companions, the issue is more isolated.
How do I prevent C0041 from coming back after a repair?
For C0041 (Right Front Wheel Speed Sensor Circuit Range/Performance), prevention centers on the speed system. Inspect wheel speed sensor wiring at PM (rodents love it). Keep ABS tone rings clean.