C0045 on Jeep
Left Rear Wheel Speed Sensor Circuit
C0045 on Jeep vehicles indicates left rear wheel speed sensor circuit. Au7o has documented this code across 1 Jeep model — most commonly on Grand Wagoneer. 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 Jeep range from $250 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 Jeep by Model
Jeep Grand Wagoneer(1 issue)
- Electronic Stability Control/ABS warning with wheel speed sensor or tone ring faults2022-2024
NHTSA complaints and owner reports describe intermittent ABS/ESC warnings on Grand Wagoneer tied to wheel speed sensor signal loss or erratic readings, sometimes after wet weather or road debris impacts. When the system detects implausible wheel speed data, it can disable ABS/ESC functions and illuminate multiple warnings.
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View C0045 across all makes →Frequently Asked Questions
What does C0045 mean on Jeep?▼
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 Jeep specifically, this code is documented across 1 model.
What causes C0045 on Jeep vehicles?▼
Common causes on Jeep: 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 Jeep?▼
Repair costs on Jeep range from $250 to $1,200, depending on the specific model and root cause.
Which Jeep models have C0045 documented?▼
Au7o has documented C0045 on 1 Jeep model: Grand Wagoneer.