C0223 on GMC: How to Diagnose & Fix
Right Front Wheel Speed Sensor Signal Erratic
1 GMC model · 1 documented issue · 1 critical · $180-$900 repair
C0223 on GMC by model: symptoms, diagnosis and fix
GMT800 SUVs commonly develop corrosion under the front wheel speed sensors or wear in the hub bearing assembly, which alters the low-speed wheel speed signal. The result is unexpected ABS activation at parking-lot speeds, longer stopping distances, and a pulsating brake pedal even on dry pavement. GM documented this condition in service bulletins, and owners frequently report replacing hub assemblies to cure it.
Common Symptoms
- ABS activates at 3-10 mph on dry roads
- brake pedal kicks back at low speed
- longer stopping distance near a stop sign
- ABS warning light
- grinding or humming from front wheel bearing
How to Fix
Scan ABS wheel speed data during a low-speed stop and compare left and right front sensor readings. If one sensor drops out, inspect for rust buildup under the sensor or excessive hub play; cleaning the sensor mounting surface may help temporarily, but many vehicles need a complete front hub/bearing assembly with integrated sensor. Clear ABS codes and road-test after repair.
Sources for this issue (1)
C0223 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does C0223 mean on a GMC?
C0223 stands for "Right Front Wheel Speed Sensor Signal Erratic." This code means the ABS module is receiving a signal from the right front wheel speed sensor, but the signal is erratic or inconsistent rather than smooth and steady. An erratic signal often points to a mechanical issue — like a damaged tone ring, debris in the sensor gap, or a wobbling wheel bearing — rather than a pure wiring fault. The module may disable ABS, traction, and stability control and illuminate the warning lights. Driving on very rough terrain can occasionally trigger this code even when the system is healthy. On GMC it is documented across 1 model: Yukon XL.
What are the most common causes of C0223?
The most common causes of C0223 are: Debris, rust, or metal shavings at the sensor/tone ring, Damaged or chipped tone (reluctor) ring, Worn wheel bearing causing sensor wobble, Failing right front wheel speed sensor, Loose sensor mounting or excessive air gap, Intermittent wiring/connector fault, Rough-road false trigger (verify before replacing parts). The specific cause varies by vehicle.
How much does it cost to fix C0223 on a GMC?
Published repair estimates on GMC range from $180 to $900 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for C0223 on a different make?
View C0223 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.