C0040 on Honda
Right Front Wheel Speed Sensor Circuit
C0040 on Honda vehicles indicates right front wheel speed sensor circuit. Au7o has documented this code across 1 Honda model — most commonly on Passport. 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 Honda range from $150 to $1,200, 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 Honda by Model
Honda Passport(1 issue)
- ABS Hydraulic Unit / Wheel Speed Sensor Faults Causing ABS Warning Lights and Loss of Anti-Lock Function2000-2002
Multiple Passport owners report persistent ABS warning lights, often traced to failed wheel speed sensors, damaged sensor wiring, or faults in the ABS hydraulic control unit. On older rust-belt vehicles, corrosion at connectors and tone ring damage are common contributors. When this occurs, normal braking usually remains, but anti-lock braking is disabled and the warning lamp stays on.
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What does C0040 mean on Honda?▼
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 Honda specifically, this code is documented across 1 model.
What causes C0040 on Honda vehicles?▼
Common causes on Honda: 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 Honda?▼
Repair costs on Honda range from $150 to $1,200, depending on the specific model and root cause.
Which Honda models have C0040 documented?▼
Au7o has documented C0040 on 1 Honda model: Passport.