C0040 on Lincoln
Right Front Wheel Speed Sensor Circuit
C0040 on Lincoln vehicles indicates right front wheel speed sensor circuit. Au7o has documented this code across 1 Lincoln model — most commonly on Aviator. 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 Lincoln range from $300 to $700, 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 Lincoln by Model
Lincoln Aviator(1 issue)
- Premature Front Wheel Hub / Bearing Failure (Humming / Grinding Noise)2020-2022
Multiple Aviator owners report front wheel hub/bearing noise at unusually low mileage — in some cases under 3,000 miles, and commonly around 20,000 miles — far earlier than the typical bearing service life. The failure produces a speed-dependent humming or grinding from the affected corner that grows louder with vehicle speed, sometimes with a clunk over bumps or while cornering. The bearing is integrated into the hub assembly and replaced as a unit. Owners cite it as a recurring complaint on the 2020-2022 cars.
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What does C0040 mean on Lincoln?▼
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 Lincoln specifically, this code is documented across 1 model.
What causes C0040 on Lincoln vehicles?▼
Common causes on Lincoln: 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 Lincoln?▼
Repair costs on Lincoln range from $300 to $700, depending on the specific model and root cause.
Which Lincoln models have C0040 documented?▼
Au7o has documented C0040 on 1 Lincoln model: Aviator.