C0045 on Honda
Left Rear Wheel Speed Sensor Circuit
C0045 on Honda vehicles indicates left rear wheel speed sensor circuit. Au7o has documented this code across 1 Honda model — most commonly on Passport. This is a brake/ABS-system code. Each wheel has a speed sensor that tells the anti-lock brake (ABS), traction control, and stability systems how fast that wheel is turning. C0045 means the ABS module has detected an electrical problem in the circuit for the left rear wheel speed sensor — such as an open, short, or signal that's missing or out of range. As a result you'll typically see the ABS and traction/stability warning lights, and those safety features may be temporarily disabled even though your normal brakes still work. Typical repair costs on Honda range from $150 to $1,200, depending on the specific model and root cause.
Common Causes of C0045
- •Failed left rear wheel speed sensor
- •Damaged, corroded or disconnected sensor wiring/connector
- •Damaged or contaminated tone/reluctor ring (rust, debris, missing teeth)
- •Excessive air gap between sensor and tone ring
- •Wheel bearing wear affecting the sensor (on bearing-integrated sensors)
- •Water intrusion or corrosion in the connector
- •Faulty ABS control module (less common)
C0045 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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View C0045 across all makes →Frequently Asked Questions
What does C0045 mean on Honda?▼
C0045 stands for "Left Rear Wheel Speed Sensor Circuit." This is a brake/ABS-system code. Each wheel has a speed sensor that tells the anti-lock brake (ABS), traction control, and stability systems how fast that wheel is turning. C0045 means the ABS module has detected an electrical problem in the circuit for the left rear wheel speed sensor — such as an open, short, or signal that's missing or out of range. As a result you'll typically see the ABS and traction/stability warning lights, and those safety features may be temporarily disabled even though your normal brakes still work. On Honda specifically, this code is documented across 1 model.
What causes C0045 on Honda vehicles?▼
Common causes on Honda: Failed left rear wheel speed sensor, Damaged, corroded or disconnected sensor wiring/connector, Damaged or contaminated tone/reluctor ring (rust, debris, missing teeth), Excessive air gap between sensor and tone ring, Wheel bearing wear affecting the sensor (on bearing-integrated sensors). Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix C0045 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 C0045 documented?▼
Au7o has documented C0045 on 1 Honda model: Passport.