C0045 on Kia
Left Rear Wheel Speed Sensor Circuit
C0045 on Kia vehicles indicates left rear wheel speed sensor circuit. Au7o has documented this code across 1 Kia model — most commonly on Rio. 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.
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 Kia by Model
Kia Rio(1 issue)
- HECU Electrical Short / Engine Fire Risk2012-2017
The 2012-2017 Rio is included in the broader Kia HECU recall for an electrical short in the Hydraulic Electronic Control Unit (ABS module) that can cause an engine compartment fire. The HECU can short-circuit internally even while the vehicle is parked. Kia replaces the fuse and inspects the HECU assembly.
Looking for C0045 on a different make?
View C0045 across all makes →Frequently Asked Questions
What does C0045 mean on Kia?▼
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 Kia specifically, this code is documented across 1 model.
What causes C0045 on Kia vehicles?▼
Common causes on Kia: 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 Kia?▼
Repair costs vary widely depending on the root cause and specific Kia model.
Which Kia models have C0045 documented?▼
Au7o has documented C0045 on 1 Kia model: Rio.