C0040 on Chevrolet
Right Front Wheel Speed Sensor Circuit
C0040 on Chevrolet vehicles indicates right front wheel speed sensor circuit. Au7o has documented this code across 3 Chevrolet models — most commonly on Silverado 1500, Suburban, Traverse. This is a brake/ABS-system code. The right front wheel speed sensor measures how fast that wheel is rotating and feeds that data to the anti-lock brake, traction control, and stability control systems. C0040 means the ABS module found an electrical problem in the right front wheel speed sensor circuit — for example an open circuit, a short, or a signal that is missing or out of range. You'll normally see the ABS and traction/stability lights come on, and those systems may shut off temporarily while your regular brakes keep working. Typical repair costs on Chevrolet range from $150 to $800, depending on the specific model and root cause.
Common Causes of C0040
- •Failed right front wheel speed sensor
- •Damaged, corroded or unplugged sensor wiring/connector
- •Damaged or rust-clogged tone/reluctor ring
- •Excessive air gap between sensor and tone ring
- •Wheel bearing wear affecting an integrated sensor
- •Water intrusion or corrosion at the connector
- •Faulty ABS control module (less common)
C0040 on Chevrolet by Model
Chevrolet Silverado 1500(1 issue)
- Front Wheel Hub Bearing Failure Triggering ABS Warning and Growling Noise2000-2013
Silverado 1500 trucks commonly develop front hub bearing wear, especially on higher-mileage 4x4s and trucks used on rough roads or with oversized tires. Owners report a humming or growling noise that changes with speed and steering input, and because the wheel speed sensor is integrated into the hub assembly, ABS and traction control warnings may appear as the bearing deteriorates. Excessive play can eventually affect braking feel and tire wear.
Chevrolet Suburban(1 issue)
- Front Wheel Hub Bearing Failure (ABS Light)1994-2007
The sealed front wheel bearing/hub assemblies on 4WD Suburbans wear out and are a top high-mileage complaint. Because the ABS wheel-speed sensor is integrated into the hub, a failing bearing (or a failed sensor) commonly triggers the ABS and traction/StabiliTrak warning lights along with a cyclic humming/growling that changes with speed and cornering load. The hub is a non-serviceable sealed unit.
Chevrolet Traverse(1 issue)
- Service StabiliTrak / Traction Control Warnings with Reduced Power2018-2021
Traverse owners frequently see 'Service StabiliTrak' and 'Traction Control Off' messages appear together while driving, sometimes accompanied by an engine power reduction. The warning is a downstream symptom rather than a single fault: common triggers are a failing wheel speed sensor, an ABS/EBCM module or wiring-harness fault, or an underlying engine misfire that disables the stability system. The intermittent nature makes it frustrating to diagnose without scanning stored codes.
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View C0040 across all makes →Frequently Asked Questions
What does C0040 mean on Chevrolet?▼
C0040 stands for "Right Front Wheel Speed Sensor Circuit." This is a brake/ABS-system code. The right front wheel speed sensor measures how fast that wheel is rotating and feeds that data to the anti-lock brake, traction control, and stability control systems. C0040 means the ABS module found an electrical problem in the right front wheel speed sensor circuit — for example an open circuit, a short, or a signal that is missing or out of range. You'll normally see the ABS and traction/stability lights come on, and those systems may shut off temporarily while your regular brakes keep working. On Chevrolet specifically, this code is documented across 3 models.
What causes C0040 on Chevrolet vehicles?▼
Common causes on Chevrolet: Failed right front wheel speed sensor, Damaged, corroded or unplugged sensor wiring/connector, Damaged or rust-clogged tone/reluctor ring, Excessive air gap between sensor and tone ring, Wheel bearing wear affecting an integrated sensor. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix C0040 on a Chevrolet?▼
Repair costs on Chevrolet range from $150 to $800, depending on the specific model and root cause.
Which Chevrolet models have C0040 documented?▼
Au7o has documented C0040 on 3 Chevrolet models: Silverado 1500, Suburban, Traverse.